Alkaline water: if you like it, why not make your own?

Me* reading the comments section on the Amazing Alkaline Lemons post (*not actually me)

Alkaline water seems to be a trend at the moment. Not quite so much in the UK, yet, but more so in the US where it appears you can buy nicely-packaged bottles with the numbers like 8 and 9.5 printed in large, blue letters on their sides.

It’s rather inexplicable, because drinking slightly alkaline water does literally NOTHING for your health. You have a stomach full of approximately 1 M hydrochloric acid (and some other stuff) which has an acidic pH of somewhere between 1.5 and 3.5. This is entirely natural and normal – it’s there to kill any bugs that might be present in your food.

Chugging expensive water with an alkaline pH of around 9 will neutralise a bit of that stomach acid (bringing the pH closer to a neutral value of 7), and that’s all it will do. A stronger effect could be achieved with an antacid tablet (why isn’t it antiacid? I’ve never understood that) costing around 5p. Either way, the effect is temporary: your stomach wall contains special cells which secrete hydrochloric acid. All you’re doing by drinking or eating alkaline substances is keeping them busy.

(By the way, I’m not recommending popping antacids like sweeties – it could make you ill with something called milk-alkali syndrome, which can lead to kidney failure.)

Recently, a video did the rounds of a woman testing various bottled waters, declaring the ones with slightly acidic pHs to be “trash” and expressing surprise that several brands, including Evian, were pH neutral. The horror. (For anyone unsure, we EXPECT water to have a neutral pH.)

Such tests are ridiculous for lots of reasons, not least because she had tiny amounts of water in little iddy-biddy cups. Who knows how long they’d been sitting around, but if it was any length of time they could well have absorbed some atmospheric carbon dioxide. Carbon dioxide is very soluble, and it forms carbonic acid when it dissolves in water which, yes, would lower the pH.

Anyway, there’s absolutely nothing harmful about drinking water containing traces of acid. It doesn’t mean the water is bad. In fact, if you use an ion exchange filter (as found in, say, Brita filter jugs) it actually replaces calcium ions in the water with hydrogen ions. For any non-chemists reading this: calcium ions are the little sods that cause your kettle to become covered in white scale (I’m simplifying a bit). Hydrogen ions make things acidic. In short, less calcium ions means less descaling, but the slight increase in hydrogen ions means a lower pH.

So, filtered water from such jugs tends to be slightly acidic. Brita don’t advertise this fact heavily, funnily enough, but it’s true. As it happens, I own such a filter, because I live in an area where the water is so hard you can practically use it to write on blackboards. After I bought my third kettle, second coffee machine and bazillionth bottle of descaler, I decided it would be cheaper to use filtered water.

I also have universal indicator strips, because the internet is awesome (when I was a kid you couldn’t, easily, get this stuff without buying a full chemistry set or, ahem, knowing someone who knew someone – now three clicks and it’s yours in under 48 hours).

The pH of water that’s been through a (modern) ion-exchange filter tends to be slightly acidic.

The water in the glass was filtered using my Brita water filter and tested immediately. You can see it has a pH of about 5. The water straight from the tap, for reference, has a pH of about 7 (see the image below, left-hand glass).

The woman in the YouTube video would be throwing her Brita in the trash right now and jumping up and down on it.

So, alkaline water is pretty pointless from a health point of view (and don’t even start on the whole alkaline diet thing) but, what if you LIKE it?

Stranger things have happened. People acquire tastes for things. I’m happy to accept that some people might actually like the taste of water with a slightly alkaline pH. And if that’s you, do you need to spend many pounds/dollars/insert-currency-of-choice-here on expensive bottled water with an alkaline pH?

Even more outlandishly, is it worth spending £1799.00 on an “AlkaViva Vesta H2 Water Ionizer” to produce water with a pH of 9.5? (This gizmo also claims to somehow put “molecular hydrogen” into your water, and I suppose it might, but only very temporarily: unlike carbon dioxide, hydrogen is very insoluble. Also, I’m a bit worried that machine might explode.)

Fear not, I am here to save your pennies! You do not need to buy special bottled water, and you DEFINITELY don’t need a machine costing £1.8k (I mean, really?) No, all you need is a tub of….

… baking soda!

Yep, good old sodium bicarbonate, also known as sodium hydrogencarbonate, bicarb, or NaHCO3. You can buy a 200 g tub for a pound or so, and that will make you litres and litres and litres of alkaline water. Best of all, it’s MADE for baking, so you know it’s food grade and therefore safe to eat (within reason, don’t eat the entire tub in one go).

All you need to do is add about a quarter of a teaspoon of aforementioned baking soda to a large glass of water and stir. It dissolves fairly easily. And that’s it – alkaline water for pennies!

Me* unconvinced by the flavour of alkaline water (*actually me).

Fair warning, if you drink a lot of this it might give you a bit of gas: once the bicarb hits your stomach acid it will react to form carbon dioxide – but it’s unlikely to be worse than drinking a fizzy drink. It also contains sodium, so if you’ve been told to watch your sodium intake, don’t do this.

If I had fewer scruples I’d set up shop selling “dehydrated alkaline water, just add water”.

Sigh. I’ll never be rich.


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Puzzling pool problems?

We’re half way thorough the Rio 2016 Olypics, and it will have escaped no one’s notice that there have been a few little problems with one of the pools.

Maria Lenk Aquatic Enter, Tuesday, Aug. 9, 2016. (AP Photo/Matt Dunham)

Maria Lenk Aquatic Enter, Tuesday, Aug. 9, 2016. (AP Photo/Matt Dunham)

First, the water turned a mysterious green colour. Then there were reports of a ‘sulfurous’ smell, with German diver Stephan Feck reported as saying it smelled like a “fart”.

The diving pool seemed to be the worst affected, but the water-polo pool next to it also suffered problems, and competitors complained of stinging eyes.

So what on earth was happening? An early suggestion was that copper salts were contaminating the water. It’s not unheard of for copper compounds to get into water supplies, and it would certainly explain the colour; copper chloride solutions in particular are famously greeny-blue. But what about that sulfurous smell? Copper chloride doesn’t smell of sulfur.

Was the strange pool colour due to algae bloom?

Was the strange pool colour due to an algae bloom, like this one in Lake Erie?

The most likely culprit was some sort of algae bloom – in other words rapid algae growth – with the smell probably coming from dimethyl sulfide, or DMS. There’s a singled-celled phytoplankton called Emiliania huxleyi which is particularly famous for producing this smelly compound. In fact, it actually has more than one very important role in nature: the smell is thought to alert marine life that there’s food nearby, but it also seeps into the atmosphere and helps with cloud formation, helping to control our planet’s temperature. Without these reactions, Earth might not be nearly so habitable.

But how did algae manage to grow in the pool? The pool chemicals should have prevented it, so what had happened? An Olympic official then went on to make the comment that “chemistry is not an exact science,” which of course led to much hilarity all around. Chemistry is, after all, incredibly exact. What chemistry student doesn’t remember all those calculations, with answers to three significant figures? The endless balancing of equations? The careful addition of one solution to another, drop by drop? How much more ‘exact’ would you like it to be?

But I had a bit of sympathy with the official, because I suspect that what they actually meant – if not said – was that swimming pool chemistry is not an exact science. And while that, too, is hardly accurate, it is true that swimming pool chemistry is very complicated and things can easily go wrong, particularly when you’re trying to work on an extremely tight schedule. They could hardly, after all, close down all the pools and spend several days carrying out extensive testing in the middle of the sixteen-day-long Olympic Games.

Rio 2016 Olympics Aquatics Stadium (Image: Myrtha Pools)

Rio 2016 Olympics Aquatics Stadium (Image: Myrtha Pools)

When a pool is first built and filled, things are, theoretically, simple. You know exactly how many cubic litres of water there are, and you know exactly how much of each chemical needs to be added to keep the water free of bacteria and other nasties. Those chemicals are added, possibly (particularly in a pool this size) via some kind of automated system, and the pH is carefully monitored to ensure the water is neither too alkaline (basic) nor too acidic.

There’s a certain amount of proprietary variation of swimming pool chemicals, but it essentially all comes down to chlorine, which has been used to make water safe now for over 120 years.

Originally, water was treated to make it alkaline and then chlorine gas itself was added. This produced compounds which killed bacteria, in particular sodium hypochlorite, but the practice was risky. Chlorine gas is extremely nasty stuff – it has, after all, been used as a chemical weapon – and storing it, not to mention actually using it, was a dangerous business.

However, hundreds of people swimming in untreated water is a recipe for catching all kinds of water-borne disease, so it wasn’t long before alternatives were developed.

The Chemistry of Swimming Pools (Image: Compound Interest - click for more info)

The Chemistry of Swimming Pools (Image: Compound Interest – click graphic for more info)

Those alternatives made use of the chemistry that was happening anyway in the water, but  allowed the dangerous bit, with the elemental chlorine, to happen somewhere else. And so hypochlorite salts began to be manufactured to be used in swimming pools.

As the lovely graphic from Compound Interest illustrates, sodium hypochlorite reacts with water to form hypochlorous acid, which in turn goes on to form hypochlorite ions. These two substances sit in an equilibrium, and both are oxidants, which is good because oxidants are good at blasting bacteria. The equilibria in question are affected by pH though, which is one reason why, quite apart from the potential effects on swimmers, it’s so important to manage the pH of pool water.

There are a couple of different chemicals which can be added to adjust pH. Sodium bicarbonate, for example, can be used to nudge the pH up if needed. On the other hand, sodium bisulfate can be used to lower pH if the water becomes too alkaline.

Open-air pools have particular problems

UV light breaks down the chemicals that are used to keep swimming pool water clean.

This can all be managed extremely precisely in an unused, enclosed pool. But once you open that pool up, things become less simple. Open-air pools have a particular problem with UV light. Chlorine compounds are often sensitive to UV – this is why CFCs are such a problem for the ozone layer – and hypochlorite is no exception. In the presence of UV it breaks down in a process called photolysis to form chloride ions and oxygen. This means that outdoor pools require more frequent treatments, or the addition of extra chemicals to stabilise the ‘free available chlorine’ (FAC) levels.

Sadly, I haven’t managed to make it over to Rio, but from what I’ve seen the Aquatic Centre has a roof which opens up, which means that the pool water is indeed being exposed to UV light.

So perhaps the chemical levels simply dropped too low, which allowed algae to proliferate? Possibly aggravated by environmental conditions? Indeed, initially this seemed to be the explanation. FINA, the international governing body of aquatics, issued a statement on Wednesday afternoon which said:

“FINA can confirm that the reason for the unusual water color observed during the Rio diving competitions is that the water tanks ran out of some of the chemicals used in the water treatment process. As a result, the pH level of the water was outside the usual range, causing the discoloration. The FINA Sport Medicine Committee conducted tests on the water quality and concluded that there was no risk to the health and safety of the athletes, and no reason for the competition to be affected.”

This prompted people to wonder how on earth chemical levels were allowed to run out in an event as significant as the Olympics – did someone forget to click send on the order? – but still, it seemed to explain what had happened.

FINA issued a new statement

FINA issued a new statement on Sunday

Until today (Sunday), when more information surfaced as Olympic officials announced that they were going to drain at least one of the swimming pools and refill it. This is no small feat and will involve considerable cost: after all, we’re talking about millions of gallons of water. But it seems to be necessary. As Rio 2016’s director of venue management Gustavo Nascimento said:

“On the day of the Opening Ceremonies of the Games, 80 litres of hydrogen peroxide was put in the water. This creates a reaction to the chlorine which neutralises the ability of the chlorine to kill organics. This is not a problem for the health of anyone.”

Whoops. Yes indeed. Hydrogen peroxide reacts with chlorine to produce oxygen and hydrochloric acid. In fact, hydrogen peroxide is actually used to dechlorinate water which contains levels of chlorine that are too high. It might not be the very worst thing you could add to the water (when you think of all the things that could end up swimming pools) but it’s definitely up there.

Why and how this happened doesn’t, at the moment, appear to be clear. Presumably someone is for the high jump, and not just on the athletics field.

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Words of woo: what does ‘alkalise’ mean?

220px-Marketvegetables

‘alkaline’ diets usually revolve around eating lots of fruit and vegetables – no bad thing, but it won’t change your body’s pH

If you hang around in the unscientific chunks of the internet for any length of time, as I find myself doing from time to time, you start to come across certain words that get used over and over. They are usually words that sound very sciency, and they’re being used to make things sound legitimate when, if we’re honest, they’re really not.

One such word is ‘alkalise’ (or ‘alkalize’). I’ve met it often ever since I wrote my post ‘Amazing alkaline lemons?‘. So, what does this word mean?

Good question. Google it, and at least the first three pages of links are about diets and how to ‘alkalise your body’ featuring such pithy lines as:

“It’s not really a diet… it’s a way of eating” (is there a difference?)
“Alkalise or live a life of misery” (gosh)
“Alkalise or die” (blimey)
“Alkaline water” (apparently this is a thing)
“Why it’s important to alkalise your water” (using our overpriced products)

In fact, I had to click through several pages of Google links before I even got to something that was simply a definition. (I’m aware that Google personalises its search results, so if you try this yourself you might have a different experience.) Certainly, there are no legitimate chemistry, biochemistry – or anything else like that – articles in sight.

Hunt specifically for a definition and you get turn basic and less acidic; “the solution alkalized”‘ (The Free Dictionary), to make or become alkaline. (Dictionary.com) and, simply, ‘to make alkaline’ (Collins).

Universal_indicator_paper

pH 7 is neutral, more than 7 is basic

The first of these is interesting, because it refers to ‘basic’. Now, as I’ve explained in another post, bases and alkalis are not quite the same thing. In chemistry a base is, in simple terms, anything that can neutralise an acid. Alkalis, on the other hand, are a small subset of this group of compounds: specifically the soluble, basic, ionic salts of alkali metals or alkaline earth metals.

Since there are only six alkali metals (only five that are stable) and only six alkaline earth metals (the last of which is radium – probably best you steer clear of radium compounds) there are a rather limited number of alkalis, namely: lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, caesium hydroxide, beryllium hydroxide, magnesium hydroxide, calcium hydroxide, strontium hydroxide, barium hydroxide and radium hydroxide. There you go. That’s it. That’s all of them. (Okay, yes, under the ‘soluble in water’ definition we could also include ammonium hydroxide, formed by dissolving the base, ammonia, in water – that opens up a few more.)

This, you see, is why real chemists tend not to use the term ‘alkalise’ very often. Because, unless the thing you’re starting with does actually form one of these hydroxides (there are some examples, mostly involving construction materials), it’s a little bit lead-into-gold-y, and chemists hate that. The whole not changing one element into another thing (barring nuclear reactions, obviously) is quite fundamental to chemistry. That’s why your chemistry teacher spent hours forcing you to balance equations at school.

No, the relevant chemistry word is ‘basify‘. This is such a little-known word that even my spell checker complains, but it’s just the opposite of the slightly better-known ‘acidify’ – in other words, basify means to raise the pH of something by adding something basic to it. Google ‘basify’ and you get a very different result to that from ‘alkalise’. The first several links are dictionary definitions and grammar references, and after that it quickly gets into proper chemistry (although I did spot one that said ‘how to basify your urine’ – sigh).

What does all this mean? Well, if you see someone using the word “alkalising” it should raise red flags. I’d suggest that unless they’re about to go on to discuss cement (calcium hydroxide is an important ingredient in construction materials) cocoa production or, possibly, certain paint pigments, then you can probably write off the next few things they say as total nonsense. If they’re not discussing one of the above topics, the chances are good that what they actually know about chemistry could safely fit on the back of a postage stamp, with space to spare, so nod, smile and make your escape.

For the record, you absolutely don’t need to alkalise your diet. Or your urine*. Really. You don’t.

And please don’t waste your money on alkaline water.

—-

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Lemon

There’s no good evidence that drinking lemon juice has a significant impact on urine pH.

* In the event that you actually have problematically acidic urine, perhaps due to some medical condition, there are proven treatments that will neutralise it (i.e. take it to around pH 7, which is the pH urine ought to be, roughly). In particular, sodium citrate powder can be dissolved in water to form a drinkable solution. Of course, if this is due to an infection you should see a doctor: you might need antibiotics – urinary tract infections can turn nasty. Yes, I am aware that the salt of the (citric) acid in lemons is sodium citrate, however there is no good evidence that drinking lemon juice actually raises urine pH by a significant amount. And yes, I’m also aware that dietary intake of citrate is known to inhibit the formation of calcium oxalate and calcium phosphate kidney stones, but that’s a whole other thing. If you have kidney stones there are a number of dietary considerations to make, not least of which might be to cut down on your consumption of certain fruits and vegetables such as strawberries and spinach (and ironically, if you look at some of the – entirely unscientific – lists of acid-forming and alkali-forming foods these are almost always on the alkaline side).

A horrifying story: autism, miracle mineral solution and the CD protocol

miracle-mineral-solution-220

It looks lovely, but what IS it?

UPDATE: August 2016
I’ve written a summary of the key CD/MMS facts, which you will find if you follow this link. The numbers quoted are slightly different in places, as I revised my calculations based on new reading.


In my last blog post I wrote about people using apricot kernels, which contain amygdalin, as a cancer treatment. I explained how this chemical is toxic, and why eating apricot kernels could be extremely dangerous. For me, the scariest thing was that some groups were recommending that children eat them to ‘ward off cancer’. If an adult makes a bad decision about their health and treatment and consequently makes themselves more ill, or even dies as a result, it is of course a tragedy. People who prey on vulnerable individuals in this way should have the book thrown at them (and as I said in my last post, the owner and director of The Vitamin Service Ltd was given a six-month suspended prison sentence and his company was fined £10,000 for just this).

But when these dangerous treatments are given to children it’s worse. It’s much, much, MUCH worse, because children aren’t consenting. They haven’t read around the whole area and made a conscious decision, even if deeply flawed, to ignore the advice of medically-trained professionals in favour of following some other regime. They trust their parents. If their parents are somehow persuaded into giving them something dangerous and toxic, they don’t know any different.

This is why when I heard about miracle mineral solution (MMS, sometimes called ‘master mineral solution’, or ‘miracle mineral supplement’) and the CD Protocol I felt I had to write about it. Plenty of others have written about this and tried to warn people, but this is one of those times that I feel that the more people that talk rationally about this, the better. If someone is even a bit undecided and goes looking for more information, I want them to stand every chance of finding words like these rather than dangerous and inaccurate information. So here goes.

Screen Shot 2015-03-30 at 21.20.37

This year’s controversial Autism One conference is in May.

MMS and CD have been around for a few years, but they’re in the public eye again at the moment because of the upcoming Autism One conference*. This is a conference that claims to provide education and support advocacy efforts for children and families ‘touched by’ an autism diagnosis. Which all sounds very worthy and positive, but the conference is deeply controversial for, amongst other things, its anti-vaccination stance, its support for highly questionable therapies, and the general assertion that we are currently suffering some kind of ‘autism epidemic’ caused by environmental factors (although it’s true that autism diagnoses have risen in the last few years, evidence suggests this has much more to do with better diagnostic techniques than anything else).

This year’s Autism One conference is at the end of May, and someone called Kerri Rivera is planning to speak there.

KerriRivera

Kerri Rivera

Rivera is one of the founders of CD Autism. Visit the CD Autism website, and you will see that their headline is “Autism: Avoidable. Treatable. Curable”, which ought to right a few alarm bells right there.

For those who might not be aware, autism is what’s called a neurodevelopmental disorder, which essentially means the brain doesn’t develop in the ‘normal’ way. In particular, children with autism struggle with social interactions and often engage in repetitive, compulsive behaviours such as flapping their hands or compulsively lining up objects. Autism symptoms usually appear gradually as the child gets older, but occasionally children get to one or two years old and then suddenly appear to go ‘backwards’ and lose their ability to communicate with the world around them. Exactly why this happens isn’t well understood. There is strong evidence that autism is primarily genetic, although it is possible that environmental factors (pollutants, certain drugs, etc) in the first 8 weeks of pregnancy might also trigger it. Either way, it looks like children are born with autism, even if their symptoms don’t appear until later.

Autism-stacking-cans_2nd_edit

Children with autism often repetitively stack objects.

Autism has no cure, in the sense that there isn’t a medicine or a treatment plan you can follow which will make it go away (although Kerri Rivera would have everyone believe otherwise). Children, however, often improve as they get older. This is probably simply due to the fact that as children grow their brains develop, and the human brain is remarkably adaptable and flexible. Autism is a spectrum disorder, which means there’s a huge range in the level of impairments individuals suffer. Those at the more severe end of the spectrum will always need huge amount of support and will never achieve independence. On the other hand, you do very occasionally hear stories of children ‘recovering’ from autism and losing their diagnosis (although it’s more likely that they were misdiagnosed in the first place). Others are able to learn coping strategies as they get older and, while they will probably always find certain aspects of daily life difficult, are ultimately able to function quite successfully in society.

This is where it gets dangerous, because a condition that naturally tends to improve over time is an absolute gift to anyone pushing quackery. It means that no matter what you do (or don’t) do, you’ll always be able to find lots of positive testimonials from people who are happy to say “I tried this and it worked for us!”, “My son/daughter is so much better since we started this treatment!” They probably did see a genuine improvement. Thing is, they would have seen it anyway. The really worrying question is: might they have seen a bigger improvement without the treatment? 

And so briefly back to CD Autism’s tagline: “Autism: Avoidable. Treatable. Curable”. Scientific research suggests that autism probably isn’t avoidable; children are born with it. It’s not curable. There are strategies which can help children and their families to mange it (along the lines of speech therapy, social skills therapy, structured teaching and so on), but there’s no one, single proven ‘treatment’ for autism.

As a parent myself, I can empathise with parents who don’t want to believe these things. You gave birth to an apparently normal and healthy child, and then you’re told they have this condition which will affect them for the rest of their life. A condition which prevents them from interacting normally with you and the rest of your family, and one which other people will find very difficult to understand. People who don’t know them may very well think they’re rude and disruptive, and that you’re a weak parent who needs to start dishing out some discipline. Your child probably isn’t going get the education you hoped for them. They might not be able to live independently, or even ever communicate effectively. And there’s no cure for this, although some therapy might help. Your child might improve with time, but you’ll just have to wait and see how much. The uncertainty, and the stress of dealing with a child exhibiting such difficult behaviours, must be incredibly difficult to deal with.

So yes, I can understand why parents might not want to believe the science. The whole ‘big pharma has all the doctors on its payroll‘ thing must be very tempting. People like Kerri Rivera say they’re not making money from selling these treatments – they genuinely just want to spread the word – so that makes them trustworthy, right? There are many stories of other parents who’ve tried it, and they say their child improved. Surely doing something is better than doing nothing?

Well, no. No, it isn’t. Not in this case.

Have you been wondering what the CD in ‘CD Autism’ stands for? It stands for chlorine dioxide. The ‘CD protocol’ is the chlorine dioxide protocol and CDS (another common acronym) stands for ‘chlorine dioxide solution’.

CDS is made from MMS: ‘miracle’, or ‘master’ mineral solution. Minerals sound good for you, right? It’s important to eat your vitamins and minerals, isn’t it?

Let’s get down to the chemistry. Kerri Rivera has previously attacked her critics for not knowing any chemistry, and describing MMS and CDS inaccurately as a result. Well I know some chemistry. I have a BSc and a PhD in the subject, and I taught it for over ten years. So I reckon I know enough not to get this wrong.

On the CD Autism site Rivera quite openly states that this treatment is based around chlorine dioxide, ClO2, which is produced when two liquids – sodium chlorite and citric acid – are combined. I reiterate, this isn’t hidden in any way, they are quite open about it.

SodiumChlorite

Sodium chlorite, NaClO2

There is also an MMS Wiki, which explains in more detail exactly what is in this solution and how it’s ‘activated’. Here they are again quite open: MMS starts out as a 22.4% solution of sodium chlorite, NaClO2, along with some table salt (sodium chloride, NaCl) and other trace ‘neutral’ chemicals “such as sodium hydroxide, sodium carbonate and sodium bicarbonate”. I find it interesting that they use the term neutral, because sodium hydroxide certainly is not, and least not in the pH sense of neutral. Sodium hydroxide is a strong alkali with a pH of (depending on the concentration) somewhere between 11-14. Sodium bicarbonate and sodium carbonate are also alkaline, although not as strong as sodium hydroxide. That said, Wikipedia gives a pKa value for NaClO2 of 10-11, which I estimate ought, for a 22.4% solution, to produce a slightly acidic pH of about 5 (I was expecting it to be alkaline, so fellow chemists, please weigh in if you disagree – is the pKa value wrong?) I suspect that enough sodium hydroxide is added to keep the mixture slightly alkaline, since NaClO2 is stable in alkaline and neutral solutions.

To a chemist, this list of chemicals is not very surprising. Bleach solution, the stuff that you use to clean your bathroom, is made by mixing cold sodium hydroxide with chlorine gas to produce a mixture of sodium chloride, sodium chlorate(I) (NaClO, also sometimes called sodium hypochlorite), and water. Just to be absolutely crystal clear, bleach is not one single pure chemical, it’s a mixture. Household cleaning products have even more stuff added to them to make them more effective, so it’s probably not accurate to directly compare MMS to household bleach (this doesn’t mean they’re safe, please read on).

NaClO2, the stuff in MMS, is made slightly differently. But it still starts out with the reaction between chlorine and sodium hydroxide, except this time the solutions are hot. This produces yet another form of sodium chlorate, NaClO3, which can then be combined with a reducing agent to ClO2 and a mixture of other things.

NaClO and NaClO2 are not quite the same things, something which Rivera and other CD advocates have been keen to point out. MMS is not bleach, they say, no matter how the media reports it. They have similar formulas, yes, but ozone and oxygen (a favoured example) also differ by one oxygen atom, and it’s safe to breathe oxygen whereas it’s not safe to breathe ozone.

Well. Yes. The thing about ozone and oxygen is true. Yes. But does that imply that NaClO2 and chlorine dioxide are completely safe and inert? Er, no. NaClO2 is a strong oxidant and, although it may not technically be bleach, and isn’t as corrosive as the bleach solution in your bathroom cupboard, will still make you sick if you drink it. In particular, it could affect blood-oxygen transport and cause kidney failure, amongst other things. It has an LD50 of 350 mg/kg for rats. That means that if rats are fed 350 mg per kg of body weight, half of them will die. If we scale that up to a 20 kg child (very roughly 6-7 years old), that suggests that 7 grams is enough to kill. Remember that MMS is a 22.4% solution, which I assume means 22.4 g per 100 g of water.

That means that a 100 ml bottle of MMS might be enough to kill a young child three times over.

Perhaps this is disingenuous of me. CD Autism don’t advocate drinking whole bottles of MMS, they suggest using a few drops at a time. Perhaps it’s not fair to talk about toxicity in this way. After all you can, for example, perfectly safely take a small amount of paracetamol, but if you swallow a whole packet you’ll be in serious trouble.

Chlorine-dioxide-from-xtal-3D-balls

Chlorine dioxide, ClO2

But here’s the kicker, you don’t use MMS as it is. You ‘activate it’. Ah yes. This means mixing it with an acid solution, in particular citric acid, the acid found in citrus fruits such as oranges and lemons. When you do this, another chemical reaction happens, and ClO2 (chlorine dioxide), NaCl (sodium chloride) and water are formed, and the resulting pH ends up somewhere around the 2.5-3 mark (which is acidic). Now we have a chlorine dioxide solution, hence “CDS”.

Screen Shot 2015-03-30 at 15.45.05

You really don’t want to swallow this stuff.

Let’s look at the safety data for chlorine dioxide. Chlorine dioxide IS a bleach. You see, they’re clever here. When denying the whole bleach thing, they say ‘MMS is not bleach’ (true), not ‘CDS is not bleach’ (which would be false). Chlorine dioxide is a strong oxidising agent and under EU classification it’s described as very toxic, corrosive and damaging to the environment. It’s LD50 is lower than NaClO2‘s (lower is bad, it means less of it will kill you). Under US classifications, it has an NFPA Health rating of 3, which means that “short exposure could cause serious temporary or moderate residual injury”. Compared to chlorine dioxide, NaClO2 is practically harmless.

Industrially chlorine dioxide is used to bleach wood pulp and in water purification, but because it’s toxic the US Environmental Protection Agency has set a maximum level of 0.8 mg/L for chlorine dioxide in drinking water. Now, it’s difficult to be sure exactly how much NaClO2 actually gets converted to ClO2 when it’s ‘activated’ by adding citric acid, but based on the only half-sensible balanced equation I could find and allowing for 70% conversion, I estimate conservatively that there would be about 9.5 grams of chlorine dioxide per 100 ml of activated master mineral solution (plus, don’t forget, there’s still some NaClO2 as well). That’s 95,000 mg/L, which is over one hundred thousand times the safe limit for drinking water. Even if the conversion is much less than I’ve estimated, I think we can be sure it’s well over safe limits.

And this, THIS, is the stuff that CD Autism are advocating that parents give to their children to swallow, and use in enemas.

Oh, but wait, I know what’s coming: you don’t use the whole solution in one go. You use a few drops at a time. Fine. How many drops? Well, there are different ‘protocols’ for different diseases, and for different stages of ‘treatment’, but to pick one fairly randomly I have seen someone mention 15 drops in 700 mls. Assuming a drop is 0.1 ml, I reckon that’s still about 200 mg/L. To reiterate, US safe limits are 0.8 mg/L. This is two thousand times safe limits. Even if some of my assumptions turn out to be over-generous, we are dangerously over safe limits. Do not listen when CD Autism tell you chlorine dioxide is safe because it’s used in drinking water, and because they’re only using small amounts. It is not. The amounts they’re suggesting are not, in fact, that small. This is highly dangerous and is highly likely to make your child seriously ill.

As the FDA warns, CDS can cause nausea, vomiting, diarrhoea, and symptoms of severe dehydration. There have also been reports of liver failure and severe kidney damage. CD Autism will say that the nausea and diarrhoea are symptoms of ‘detox’. It is just your body getting rid of ‘parasites’ and ‘toxins’ that have accumulated. It’s not. These are symptoms of acute toxicity. The chlorine dioxide is poisoning you, or worse, your child. These symptoms are a sign that you should stop before you do any more damage. If it’s not already too late.

The advocates CDS say that “the chlorine dioxide molecule has a chemical characteristic that changes and makes it selective for pathogens“. In other words, chlorine dioxide somehow ‘knows’ to only attack harmful microorganisms. It doesn’t – chemistry doesn’t work that way. Molecules aren’t capable of distinguishing one from another. Chlorine dioxide attacks and damages all the cells in its path, healthy and (possibly) harmful alike. And bear in mind that the bacteria in and on our bodies still aren’t that well understood. Our bodies contain a hundred bacterial cells for every single human one. Most of these bacteria are not harmful; in fact quite the opposite. They help us digest our food, bolster our immune system, and may be involved in all kinds of other processes (there was a even a paper recently suggesting that a change in gut bacteria had caused obesity in a patient). If you put something inside you, particularly straight into your gut in the form of an enema, which indiscriminately destroys pretty much everything in its path you could be literally be doing untold damage.

I mentioned parasites back there, and I just want to say a little more about this. CD Autism and their ilk are big on parasites. They believe that huge numbers of the population are infected with parasites, and that these are causing everything from cancer to autism. Their evidence for this mainly seems to come from enemas, where the ‘results’ of enema treatments (I’ll spare you pictures) show long, mucous-y strands. They say that these are worms, and sometimes call them ropeworms. Critics, on the other hand, say they are intestinal lining, removed by the harsh enema process.

Of course there are some real intestinal worms that actually exist. Roundworms and tapeworms for example. If you think you may have one of these, see a doctor – there are safe and effective treatments you can use to get rid of them without resorting to chlorine dioxide enemas. There is however no real evidence for the fictitious ‘ropeworm’. It was born out of the fevered imaginations of Nikolai Gubarev (who works, or possibly worked, in occupational safety in Russia) and Alex Volinsky (a mechanical engineer). The articles which describe their ‘discovery’ have never been published in any kind of peer-reviewed journal, although they are available online. And the very fact that they claim in one of their papers that people with “blood pH of 8-10” are more susceptible should immediately tell you everything you need to know about their (lack of) medical background. Someone with a blood pH in that range would be dead. Blood pH is strictly maintained by your body to be between 7.35 and 7.45. If it somehow gets out of that range you’re in serious trouble. A high blood pH is otherwise known as alkalosis, and results in muscle pain, muscle weakness and low blood calcium levels, and ultimately leads to seizures.

In short, don’t believe anyone that tells you that you’re infested with parasites, unless it’s a qualified medical doctor who’s had a sample of your stool properly analysed in a laboratory.

jim-humble

Jim Humble, who started it all in 2006 with a self-published book on MMS.

Finally, I have focused mainly on autism in this piece, and that’s because I find the use of MMS and CDS in this area the most upsetting. These chemicals are being used on children, doing them terrible damage, and it’s completely out of their control. But I also want to point out that MMS and CDS are suggested for the ‘treatment’ of a whole raft of conditions. There are ‘protocols’ for everything from acne to cancer, and from mad cow disease (seriously) to yeast infections. This all seems to have started with a character called Jim Humble, who is in his own words “an inventor” (and not a scientist, and certainly not a doctor). There is an article all about him here, which I strongly recommend. Of particular note is the fact that more than one country has an arrest warrant out for him, regarding the poisoning and death of several people.

All of which means that there is a real danger that if you go looking for alternative treatments for pretty much anything, you might at some point run into someone selling MMS and CDS. And if you do, please, turn and run.

Update June 2015

On the 28th of May 2015 a man called Louis Daniel Smith was convicted, following a seven-day trial, of conspiracy, smuggling, selling misbranded drugs and defrauding the United States. Smith operated a business called “Project GreenLife” (PGL) from 2007 to 2011, which sold a product called “Miracle Mineral Supplement,” or MMS, over the Internet. The government presented evidence that Smith instructed consumers to combine MMS with citric acid to create chlorine dioxide, add water and drink the resulting mixture to cure numerous illnesses including cancer, AIDS, malaria, hepatitis, lyme disease, asthma and the common cold.

The jury convicted Smith of one count of conspiracy to commit multiple crimes, three counts of introducing misbranded drugs into interstate commerce with intent to defraud or mislead and one count of fraudulently smuggling merchandise into the United States.  The jury found Smith not guilty on one out of four of the misbranded drug counts. He faces a statutory maximum of 34 years in prison at his Sept. 9 sentencing.

For the full press release from the United States Department of Justice, just follow this link.

One down…

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* Here, and throughout this article where I have felt that I ought to link to websites associated with MMS proponents, I have used the Do Not Link service. This allows me to link to the relevant pages without giving them any kind of boost in search engine rankings. I urge anyone who writes anything of a skeptical nature to use Do Not Link. Let’s not help these guys out if we don’t have to.

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Link

It's pure something all right...

It’s pure something all right…

Recently a friend sent me a link to this page about the ‘Hexagon H2O‘ water purification system. He knew I’d love it, and I did. Not, however, for the reasons the company supplying it would presumably hope. The ‘science’ is so ludicrous, it’s hard to believe anyone would even begin to take it seriously. Sadly, this product (which, spoiler alert, is a massive scam) seems to have made quite a bit of money by scattering vaguely sciencey-sounding terms around like confetti and sucking in anyone whose chemistry and physics knowledge is, shall we say, less than detailed.

That said, it is easy to forget about water when we talk about chemistry, since we’re usually more interested in what’s in the water than the water itself. It’s actually pretty important, especially when it comes to pH. So in the spirit of finding some good good in the bad, let’s use some of their claims to have a look at the chemistry.

We begin with the very first sentence on the very first page: “With the Hexagon Alkaline Hydrogen Water Filtration System, you can transform normal tap water into hydrogen-rich alkaline water.

First of all, what is water? Water is H2O (they did get that mostly right, apart from the times they write it as H2O). What does this familiar formula mean? It means that in pure water there are two hydrogen atoms for every one oxygen atom. These atoms are strongly bonded together, and generally like to stay that way. That said, a very small number of those bonds do break at room temperature, like this:

H2O → H+ + OH

On the right of the arrow we have hydrogen ions (H+, actually, technically, H3O+) and hydroxide ions (OH).  At room temperature, there are very roughly 600000000 water molecules for every hydrogen ion in pure water. In other words, hardly any hydrogen (and hydroxide) ions at all. This is because every time a water molecule breaks up into hydrogen ions and hydroxide ions, they just as quickly recombine to form water again.

Now this is for pure water, and pure water has a pH of 7. The reason it has a pH of 7 is because it has this ratio of hydrogen (and hydroxide) ions to water molecules. A solution with a different pH will have a different ratio. If it’s acidic, it has more hydrogen ions. If it’s alkaline, fewer. Assuming room temperature (I keep saying this because pH goes down ever so slightly at higher temperatures, although this does not exactly mean the water becomes more acidic) if the pH is not 7, the water is not pure.

By pure, I mean containing H2O only, and nothing else. It’s very difficult to get a completely pure sample of H2O, because in a single gram of water there are about 30000000000000000000000 molecules. If we’re talking about pure in the, er, purest sense, that means there can’t be even one other molecule or ion in there, and that’s highly unlikely. Not least because gases in the air dissolve in water. Still, you see my point. Pure water has a pH of 7 (at room temperature), and is neither acidic nor alkaline. End of story.

So, back to “hydrogen-rich, alkaline water”. ‘Hydrogen-rich’ could either mean it contains dissolved H2 gas (which is highly unlikely, since it’s pretty insoluble) or that it contains lots of H+ ions. Which would make the water acidic. Which would mean it can’t also be alkaline.

At the risk of stating the obvious, there is no way this statement can be correct.

It gets worse from there. The site helpfully ‘explains’ some terms, and the first of these is ‘alkaline’. Apparently, this is “how water should be”. Well, no. See above. Indeed, if the water were significantly alkaline it would be a bit of a problem. It would taste bitter (yuck), probably cause stomach trouble over time and might even irritate your skin. In fact, this is quite likely, since later on they claim their water has a pH between 8 and 10. 10 is really quite high; hand soap and indigestion remedies have a pHs of about 10.

The first page also says: “The body has natural alkaline buffers against excessive acidity so it can maintain blood pH at the optimum level. However, over-acidity can often occur after a prolonged period of bad eating and stress.Now, I’ve been over this at length. Nothing you eat or drink can change your blood’s pH, which is tightly controlled at about 7.4. There is also no such thing as an ‘alkaline buffer’ (see my recent post on buffers). A very unhealthy diet will certainly have a negative impact on your health over time, for example it might have an effect on bone density. However drinking an alkaline solution is really not the way to combat that. Sadly, the answer is the usual boring stuff about eating more vegetables and perhaps cutting back a bit on meat and dairy. If you just drink an alkaline solution, your stomach acid will simply neutralise it.

We go on, “[by drinking Hexagon water] you are simply helping your natural alkaline buffers to restore pH balance and to reduce health-robbing acid in your body“. Hm. Acid is actually quite important in the body. Your stomach contains hydrochloric acid, which you need to digest food and to protect you from nasty bugs. So describing acid as health-robbing is quite misleading (although I am going to link to this article again, which is worth a read if you’re genuinely interested in actual science).

And then we get to: “Water from the Hexagon has smaller molecular clusters than normal water. This means that it can permeate the body’s cell membranes more rapidly and more efficiently to provide nutrients.”  Water molecules do form clusters, but they’re really not well understood. In fact, they’re an important area of research right now (although if you look them up you need to be careful to distinguish between genuine researchers and genuine quacks, of which there are many). How this company can claim they know anything at all about the size of the water clusters in the water their product produces is beyond me. Also, water clusters aren’t stable – the hydrogen bonds holding them together constantly break and reform, so there’s no way it can make any difference to how easily water permeates cell membranes.

It gets worse from there, with talk of “positive energy” and, my favourite, “Infus[ing] energy into water through natural spiralling movement”.

The whole thing is pure (at least something is pure) nonsense. Even Wikipedia says so. I suppose there will always be people willing to hand over their hard-earned cash for such things, but if you’ve got this far at least you won’t be one of them. Pass it on.

Buffers for bluffers

buffering

No, not that kind…

A little while ago now I wrote a post entitled Amazing Alkaline Lemons?. It’s been very popular, sort of. Well, it’s elicited an awful lot of comments anyway. Quite a few have mentioned buffers, which are jolly important things. They also seem to be somewhat misunderstood. So here we go, buffers 101:

Buffers regulate pH (remember that pH is the scale that measures how acidic, or basic, a solution is), and they’re essential in the body. Without them, your blood pH would fluctuate, and that that would be a very bad thing indeed. Outside a very narrow pH range (7.38 to 7.42, which is essentially neutral) proteins are denatured and enzymes stop working. In short, your body would quickly stop functioning in a really quite fatal way.

So what is a buffer? A buffer is actually a mixture, of a weak acid and its salt. Or, as chemists would say, its ‘conjugate base‘. (I’m deliberately avoiding the word ‘alkali’, because alkali has a specific meaning and it would be wrong to use it in this situation – I mention this because the word ‘alkalising’ has come up more than once).

The main buffer system in the blood is the bicarbonate buffering system. We need it because our blood has to transport carbon dioxide out of our bodies, and when carbon dioxide is dissolved in solution it forms an acid called carbonic acid. If this weren’t somehow controlled, our blood pH would quickly plummet and, as I’ve already mentioned, we’d die. This would obviously be something of an evolutionary dead-end.

Chemistry to the rescue! Carbonic acid (H2CO3) forms, but it also breaks apart again to form hydrogen ions (H+) and bicarbonate ions (HCO3) producing something chemists call an equilibrium (symbolised by the funny two-way arrow you can see below).

H2CO3 ⇌ H+ + HCO3

Equilibria have a way of balancing themselves out, and this is key to how buffers work. If you add some extra hydrogen ions to a buffer system the equilibrium shifts to absorb those hydrogen ions, keeping the pH constant. Likewise, if an alkali (or base) is added, it goes the other way and actually causes more hydrogen ions to be released. This is remarkably difficult to budge, unless you swamp it with a really strong acid (or base).

As a result, your blood pH stays perfectly balanced, and a good thing too. And all you need for it to work is to breathe. I recommend that if you want to stay healthy you don’t stop doing that.

There are other important buffer systems in the body. One that gets mentioned quite a lot is the phosphate buffer system. This plays a relatively minor role in controlling blood pH, but it is pretty important for your cells. This buffer is made up of dihydrogen phosphate ions and hydrogen phosphate ions. Phosphate plays an important role in bone health, not to mention your body’s ability to use energy effectively. Fortunately, unless you have some kind of fairly serious health problem your kidneys do a cracking job of controlling phosphate levels, so there’s no need to worry too much about it, beyond aiming, as we all should, for a generally healthy diet.

So there we are. Buffers are a mixture, they form naturally in the body, you don’t really need to do anything to help them along, and they quietly keep you alive. Pretty cool bit of everyday chemistry really.


Comments have now been closed on this post.

Amazing alkaline lemons?

Tonight on How Not to Get Old (I really shouldn’t have been watching it) I heard the following gem:

Lemon

Can lemons neutralise acids? (Spoiler: no)

“Lemons neutralise acidity.”

In fact, not only did I hear it, it even flashed up on the screen in a helpful little box. The speaker was Elizabeth Peyton-Jones, who says on the Channel 4 website that she is a “herbalist, naturopath and food and health consultant” and that she has “run a highly successful alternative health clinic in Central London for over a decade.”

Hm.

256px-Zitronensäure_-_Citric_acid.svg

A molecule of citric acid. Definitely not an alkali.

Let’s start here: lemons are acidic. Why are they acidic? They contain citric acid, about 5% by weight. Citric acid has the chemical formula C6H8O7, and the catchy systematic name of 2-hydroxypropane-1,2,3-tricarboxylic acid. If you look at the molecule you can see why it’s an acid. See those OH’s that are sitting next to =O’s? Those are acid groups. There are three of them. This is most definitely an acid.

Why do they make it an acid? Or rather, what is an acid? Well there is a bit more to this than I’m about to explain (interested parties could read about Lewis acids) but essentially acids are substances that can release H+ ions (‘hydrogen ions’) when they’re dissolved in water. Those three acid groups in citric acid can, in theory, release three H+ ions per molecule. So you might expect that citric acid is a pretty strong acid.

In fact, it’s not.  It’s actually what chemists call a weak acid, because although it can release three hydrogen ions per molecule it doesn’t really want to that much. It’s a stingy old Scrooge and likes to keep hold of them. But that doesn’t make it somehow not an acid, it still is one. The pH of lemon juice is about 2.

Which brings me to pH. It’s possibly the most abused and misunderstood scale ever. (There are two wonderful blog posts on that very subject, written by Marc Leger, which you really should read, obviously after you’ve finished here.) I’ve even found a school text book, yes honestly a school text book, that said “no one really knows what pH stands for”. Er. What?

Chemists know what it stands for thank you very much (I suspect, or at least hope, that the author of that book was not a chemist). The H stands for, guess what? Yes, the amount of hydrogen ions. The p is a symbol chemists use as shorthand for ‘negative log10‘ (it’s p because it comes from the German word for potency or power, potenz, and this might be why some books claim that pH stands for ‘potential hydrogen’, which it doesn’t really).

Log refers to logarithms. I’m not going to explain those in depth here – if you want to know more, this page has a clear explanation – but you will have come across other log scales. Probably the best-known is the one used to describe earthquakes: the Richter scale. Basically when you go up by a factor of 1 on the scale, it’s actually a power of 10. A major would-seriously-damage-buildings earthquake that measures 7 on the Richter scale is 1000 times more powerful than a light crockery-rattling quake that only measures 4. The pH scale is like this: every point on the scale represents ten times more (or fewer, depending on which way you’re going) hydrogen ions.

Slightly counter-intuitively (but the maths works out, honest) a lower pH means more hydrogen ions. An acidic solution with a pH of 2 has 1000 times more free hydrogen ions than one with a pH of 5. The pH scale goes from 14 down to 0, and actually negative pH values are possible as well. Values above 7 are described as alkaline (or basic), 7 itself is neutral and those below 7 are acidic.

Saying that this or that acid has a pH of a specific number (like I sort of did back up there when talking about lemons, remember I started with lemons?) is a bit of a nonsense, although many authors do it. pH refers to the concentration of hydrogen ions. You could get some hydrochloric acid (the stuff in your stomach) and dilute it, and its pH would actually go up. Really. If you drop a bit of lemon juice in a big glass of water its pH would be closer to neutral (pH 7) than 2. If you think about it you know this: drink neat lemon juice and you’re puckering up your lips in a classic ‘sour’ face. Drink some water with a bit of lemon in and you barely notice it.

Phew. Ok. Back to the frankly silly statement that lemons neutralise acid. We’ve established that lemons contain citric acid, and although citric acid is a weak acid, it still is an acid. It produces hydrogen ions when you put it in water, and for that reason the pH of lemon juice – as it comes out of the lemon – is about 2.

If you want to neutralise an acid, you need an alkali (or, more generally, a base). Alkalis contain OH ions (hydroxide ions) which can react with hydrogen ions and actually remove them from a solution, like this:

H+  +  OH  –>  H2O

Look, that’s water on the right hand side of that slightly-wonky arrow. Pure water has a neutral pH of 7. If you add exactly enough hydroxide ions to join up with all the hydrogen ions, you get water (and a salt, because there will have been some other stuff in there as well).

Once you get this far, it becomes fairly obvious that adding more hydrogen ions to hydrogen ions isn’t going to neutralise anything. It’s like trying to turn your blue paint purple by adding more blue paint.

If anything, adding more acid will make your solution even more acidic (although with a weak acid it may not be quite that simple, is it ever?) Again, experience bears this out. Your stomach contains hydrochloric acid, along with some other stuff, and has a pH of between 1.5 and 3.5. Fortunately your stomach is lined with special cells that protect you from this powerful stuff. Acid indigestion, something many of us have experienced at one time or another, happens (usually) when that stomach acid gets where it shouldn’t be, i.e. into your esophagus, where it burns.

If you have indigestion, do you drink lemon juice? No you do not. Not unless you actively like pain, that is. No, you take an indigestion remedy. Guess what they’re made of? Yes, alkalis, or bases (and sometimes other clever ingredients as well). They really do neutralise the excess acid by way of the equation I wrote up there.

And unless you have indigestion, why would you want to ‘neutralise acidity’ anyway? Stomach acid evolved for a reason. It helps to break down your food, proteins in particular, and it also keeps you safe from lots of bacteria and other nasties which usually don’t like acidic conditions. Once your stomach has done its thing the partially-digested food passes into your small intestine where it gets squirted with bile, which actually does neutralise it so it can pass through your intestines without doing any damage.

Your body has this covered. There really is no need to mess with it, and in any case, you can’t really. At least, not beyond your stomach (and urine, possibly – see my comment at the end). Homeostasis insures that everything stays remarkably consistent, and good thing too. There are lots of chemical reactions going on in your body that keep you alive, whether you realise it or not. If you could actually mess with the pH of your blood (pH 7.35-7.45) you’d be in a whole heap of trouble.

So can lemons neutralise acid? No. Can what you eat ‘alkalize’ your blood? (It’s terrifying just how many websites there are about this.) No. Absolutely not. Under no circumstances. If you were to eat a lot of indigestion tablets they would neutralise the acid in your stomach, but that would have no effect on your blood. Literally no effect.

By all means eat a healthy diet. Fruit and vegetables are definitely good for you. Lemons contain vitamin C (yet another acid: ascorbic acid) which is a vital nutrient. Eating them will certainly do you no harm and might well do you some good. But don’t let anyone tell you they’re anything more than a healthy citrus fruit.

Note: 
As you can see, this post has generated a lot of comments. Some more scientific than others.  In particular, a lot of them have focused on urine, and the effect lemon juice might or might not have on urine pH. My original post was not about urine, but clearly a lot of people are fascinated by the subject. Who knew?

So here’s a little extra on that topic to save me repeating myself in comments.

It’s well-known that chemical makeup of urine can be affected by what we eat. We’ve probably all experienced the odd effects of asparagus, or beetroot, or even sugar puffs, so the idea that certain dietary substances make their way into urine is nothing particularly new or surprising.

And following from this it IS possible to affect urine pH by eating or drinking certain substances. For example, if you’re a cystitis sufferer, you might have used a sodium citrate-containing product such as Cymalon. During a cystitis attack the urine becomes more acidic. These products work by creating a buffer effect in the bladder, which means they raise the pH slightly towards neutral and, crucially, stabilise it so that it doesn’t drop again (or, indeed, rise).

Lemons contain citric acid, the salt of which is citrate. So it’s possible eating a lot of lemons (or drinking a lot of lemon juice) could have a similar effect. I found a paper on this very topic. The researchers found that drinking lemon juice produced a small increase in urinary pH from about 6.7 to 6.9. So, ok, it went up a tiny bit (remember that pH 7 is neutral) but given that the error in their measurements was +/- 0.1, that’s virtually no change at all.

That said, the main focus of their interest was actually treatment of kidney stones, which are, in some cases, caused by a build-up of calcium oxalate which then forms crystals. The researchers found that the lemon juice helped the body to get rid of oxalate, and they’re not the only ones to draw this conclusion. Magnesium can also help prevent kidney stone formation (magnesium-rich foods include leafy greens, nuts and seeds, oily fish and whole grains – basically all that ‘healthy diet’ stuff, funnily enough).

So in summary (and I stress, I am not a medical doctor and you should take your GP’s advice over that of some blogger on the internet), if you suffer from kidney stones, lemon juice might be helpful. It certainly won’t do you any harm (well, except possibly to your tooth enamel). A generally healthy diet will also, not surprisingly, be beneficial. Lemon juice might have a very tiny effect on urine pH. However if it does, the result is only to raise the pH a tiny bit closer to pH 7 (i.e. neutral). It does not make your urine alkaline.

The topic of gout has also come up. Vitamin C is known to help with gout. Lemons contain a lot of vitamin C (ascorbic acid, not to be confused with citric acid). If you’re a gout sufferer, drinking lemon juice might help. Although taking a vitamin C supplement might be even better.

None of this in any way relates to the blood, or ‘the body’ in general. You cannot, absolutely cannot, affect your blood pH with your diet, and nor would you want to.

Oh, and buffers seem to come up a lot too. To save time I put all of that in a separate blog post: buffers for bluffers.

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Note: comments have been closed on this post because I found myself repeatedly refuting the same arguments over and over again. One in particular is the notion that lemon juice somehow becomes alkaline once in the body, and that this is why lemons are considered ‘alkaline’. Lemon juice will certainly be neutralised during the digestive process but there is no mechanism by which it could possibly “become alkaline”. Please don’t post comments on other pages in this site to get around the fact that comments have been closed.