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Alkaline water- Health benefits and risks

by Milos Pokimica ND

by Milos Pokimica ND

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"There are many health talks in the health and nutrition community about the benefits of “ionized water” or “alkaline water.” What does science have to say?"

There are many health talks in the health and nutrition community about the benefits of “ionized water” or “alkaline water.” 

What science has to say about it all?

It is possible that water contains dissolved ions. Meaning some metallic atoms or electrically charged molecules that can transfer electricity. Ideally, distilled pure water is nothing more than just H2O molecules, and that is it. These H2O molecules are arranged and linked together in a free and chaotic network structure with individual molecules bumping into one another all the time. Water in its liquid form is not a geometrical and arranged structure like ice. Water molecules also show a very slight affinity to dissociate (ionize) into hydrogen and hydroxide ions: H2O; H + + OH-. The level of this is minuscule because the opposite reaction is much stronger in bringing back the status quo instantly. On average only about two in one billion molecules of H2O are dissociated.

No technological process or chemical additive is capable of increasing these ion concentrations in pure water. Pure water can be regarded to be ion-free, as evidenced by the fact that it will not conduct an electric current. There is no known technological method or chemical additive that is able to increase these ion concentrations in pure water above these two in one billion minute levels. These levels are so small that for most realistic and practical purposes pure water can be considered ion-free. Distilled water has no ions, as shown by the fact that it is unable to conduct an electric current.

Acidic or alkaline “water” has nothing to do with the water at all, and that is what people need to understand. All water contains both H + ions and OH- ions. If the amount of H + exceeds that of OH-, the water is acidic. If there are more OH- ions than H +, the water is alkaline. If the pH values are lower than seven water is acidic, alkaline solutions are more than 7.

ph chart
PH Chart

Pure distilled water, has no ions and that means that the distillation can never be alkaline or acid, nor can it be produced by electrolysis. Since alkaline liquid always has an excess of OH ions, it must also always contain another type of positive ion in addition to H + to compensate for the opposite charges. This additional positive ion is almost always a metallic ion such as magnesium, calcium, or sodium. Similarly, acidic water must always contain negative ions in addition to OH-. This means that waters whose pH differs from 7 are never pure in the chemical sense. Distilled water is pure and can never be alkaline or acidic. Groundwater containing different metal ions that it picks up such as calcium and magnesium can be made slightly alkaline by electrolysis, but that does not mean anything. As soon as “healthy alkaline” water enters the stomach and is mixed with highly acidic gastric fluid in the stomach, its alkalinity disappears.

The idea that we should consume alkaline water to neutralize the effects of acidic foods is not correct and not just that, it is a very bad idea as well. By exhaling carbon dioxide, our bodies will get rid of excess acid. It is not a big of a problem. However, if you really do de-acidify your stomach, it will cause the problem of successful protein degradation and will interfere with digestion. If acidity in the stomach is lowered by any means during the meal, it will mean that food will not be digested properly.

There are benefits only for people with acid reflux (1). This study has found that alkaline water with pH 8.8 does instantly denature pepsin, rendering it permanently inactive. So for the patients that have reflux disease alkaline water can help in acid-buffering capacity and may have therapeutic benefits. However, if you do not have reflux, drinking it during or after the meal will cause the lowering of the acid level in the stomach and interfere with food degradation and interfere in nutrient absorption. If you want to drink it, then do not drink alkaline water except on an empty stomach. Supporters of drinking alkaline water still believe in its many proposed health benefits, like detoxifying properties, immune system support, colon-cleansing, weight loss, cancer resistance, anti-aging properties, hydration, skin health, and the list goes on and on.

There are actually a couple of Chinese studies that discovered some of the health benefits in a form of anti-oxidative support (2). The conclusion was that alkaline ionized water could enhance heat tolerance of heat-exposed mice and it might be related to enhancing anti-oxidative function against the damage by free radicals. This was a surprise to me, but I do not believe that the Chinese People’s Liberation Army would do a bad science experiment. Chinese did a couple of studies.

In this study (3) they did find something even more interesting. The objective was to analyze the changes in blood sugar, blood pressure, and blood lipids in patients with diabetes mellitus, hyperlipidemia, and essential hypertension. After they have drunk alkaline ionized water the blood lipids and blood pressure levels dropped in some subjects even to the normal ranges. The study concluded that ionized alkaline water might be used as one of the accessory therapeutic methods for diabetes mellitus, hyperlipidemia, and essential hypertension. One more study (4) discovered that alkaline water did not significantly influence the blood pH and calcium concentration but did enhance the immune function in rats significantly.

What is going on? It bugged me. There are two types of alkaline water. The artificial alkaline water which is generally tapped water runs through an electrical ionizer to make the pH more alkaline and bottled spring or mineral water. Naturally-occurring mineral water contains alkalizing compounds in the form of rocks that it picks up, such as magnesium, silica, calcium, bicarbonate, and potassium. You can also purchase ionizing water machines.

Water ionizers are machines designed to work as water electrolyzes but what they do in reality is just use platinum or titanium to make water alkaline. They do not add any of the minerals found naturally in the ground. You can just ad backing soda for cheap, and you will have alkaline water, but why does it matter at all. When electrolysis or if you like the electrochemical process split water molecules to form hydrogen and oxygen by an electric current the two types of substances will be created and none of them will be the real water. “Water” near the cathode would be alkaline and “water” near the anode would be acidic. Water ionizers work by simply siphoning off the water near the cathode that has higher pH (i.e., be more alkaline) and water near the anode would have increased levels of H+ making it acidic.

kangen machine
Kangen Machine

With machines like Kengen, you do not drink true alkaline water made in nature. You are actually drinking regular tap water with added hydroxide ions making it alkaline. It is not water at all. It just looks like water, but it is filled with hydroxide ions created by electrolysis. People talking about the antioxidative properties of this kind of Kengen created hydroxide ions filled water usually forgot or don’t even know the answer to one very important question. What happens after that hydroxide (OH–) that is antioxidant donates its electron? What happens is that it became one of the most cytotoxic oxygen radicals: the hydroxyl radical. Hydroxide is not an antioxidant, no matter what someone tells you. Hydroxide (OH–) is higher in alkaline water, but it is not a biological antioxidant. Hydroxyl radicals can occasionally also be produced as a byproduct of immune system activation. Macrophages and microglia (a type of immune cell) generate this compound to fight against some types of bacteria. The destructive action of hydroxyl radicals has been implicated in several neurological autoimmune diseases and can damage virtually all types of macromolecules. I will not personally take any antioxidant no matter how powerful it is if it has the potential to turn itself into free radicals. The hydroxyl radical has high reactivity and a very short in vivo half-life of 10 seconds. This makes it a very toxic substance to the organism. Unlike superoxide, which can be detoxified by superoxide dismutase, the hydroxyl radical cannot be eliminated by an enzymatic reaction, and once created it will do full damage. Our bodies never have to deal with this molecule in the past. It is a new and non-natural antioxidant that has the potential to do a lot of damage if not eliminated from the body. And that is the real issue. Our bodies have no enzyme to eliminate them. Never drink Kangen Water Machine fake alkaline water filled with hydroxide ions created by electrolysis.

There are some real benefits from real alkaline water, and that benefit is hydration. It took me a long time but eventually, I found a different line of research studies and I understood what is the science behind the positive effects of alkaline water found in those studies done in China. Water molecules stick together in clusters. In normal conditions, water molecules arrange themselves in clusters of 14 molecules. When electrolysis breaks the bonds between oxygen and hydrogen creating hydroxide (antioxidant) and hydrogen ions it also breaks down clusters to a smaller size. Also in alkaline water, these clusters can be as small as five water molecules. They make the water a better solvent and increase fluidity. The reason why boiling water has lower surface tension is that of this smaller clustering of water molecules. If water gets too much energy as heat, it loses the clustering ability completely and became a monoatomic form of water known as steam. And I think this is where some of the benefits of alkaline water exist.

In this study, they added some baking soda to the water and tested for cholesterol (5). The result was that systolic blood pressure decreased significantly after four weeks of bicarbonate water consumption, without meaningful differentiation between weeks 4 and 8. Then significant reductions in total cholesterol by 6.3%, LDL cholesterol, the bad cholesterol by 10%. The conclusion was that:

“Sodium-bicarbonate mineral water improves lipid profile in moderately hypercholesterolemic young men and women and could, therefore, be applied in dietary interventions to reduce cardiovascular risk.”

This water had no antioxidants in there just baking soda.

I think I found the answer in this study (6) and it was not the alkalinity of the minerals in the water. It was viscosity. This was a randomized, double-blind study with one hundred healthy adults. After exercise-induced dehydration participants were randomized to rehydrate with an electrolyzed, high-pH (alkaline) water or standing water. The result was that electrolyzed, high-pH water reduced blood viscosity by an average of 6.30% making it easier for the blood to flow through the bloodstream compared to 3.36% with standard purified water. What does blood viscosity mean? Viscosity is the internal friction of blood flow. The higher the viscosity, the harder the blood. For example, water has a lower viscosity than honey. Drinking alkaline water can be good only because of the lower viscosity and nothing else. For research into sports drinks and nutrition, this is a topic of great interest. For general public health as well.

Bottled Water alkalinity test
Bottled Water PH Test

Highly viscous blood will have a harder time going thru the bloodstream forcing the heart to work harder. The heart will have to have stronger and more powerful contractions to do the extra pumping and in the time that can weaken the heart muscle. Also, viscous blood will raise the blood pressure, and it will be more likely for the blood to form clots inside arteries and veins. If blood is sticky due to dehydration or fat in the bloodstream or other factors, the blood flow is impaired, and intercellular communication is impaired. The stickier the blood the harder it is for the body to undergo cellular detoxification. There is so far a solid understanding and a large number of studies that have been done and showed that elevated blood thickness is associated with heart disease and conditions like lupus and diabetes. Diabetes, smoking, chronic inflammation, also increases the viscosity of blood. Aspirin and warfarin and other blood thinners work by chemically inhibiting blood fragments known as platelets to clump and form clots. That is why an aspirin a day is usually prescribed to a patient who already had a heart attack or has some other sort of cardiovascular problems. Aspirin or warfarin does not, in reality, alter the thickness (viscosity) of blood and the hart still needs to pump harder and blood pressure is still elevated they just make it harder for blood to form clots. Fluid dynamics is a big science in space agencies and warfare and in general research of propulsion systems. It seems, and this is just a consideration that somehow alkaline water has a lower viscosity. It acts as a mechanism that will increase the fluidity of the blood and detoxification at the cellular level and increase the hydration of the cells and will release the pressure on the cardiovascular system. How does it do it I do not know, and I can only speculate. When insects land on the surface some of them can even walk on water due to the surface tension. When fluidity is increased, the capability for intercellular water chemical interactions increase, and the body can go into detoxification easier so inflammation will drop.

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Sources:

Passages selected from a book: “Go Vegan? Review of Science: Part 1” [Milos Pokimica]

  1. Potential benefits of pH 8.8 alkaline drinking water as an adjunct in the treatment of reflux disease. Ann Otol Rhinol Laryngol. 2012 Jul;121(7):431-4.
  2. Alkaline Ionized water enhancing heat tolerance and anti-oxidative function of heat-exposed mice. Department of Military Hygiene, the Second Military University, Shanghai 200433, China
  3. Preliminary observation on changes in blood pressure, blood sugar and blood lipids after using alkaline ionized drinking water First Hospital of Shanghai Textile, Shanghai 200060, China
  4. Effects of alkaline Ca~ (2+)-water on blood pH, calcium level and immune function in rats School of Life Science, South China Normal University, Guangzhou 510631, China
  5. Reduction in cardiovascular risk by sodium-bicarbonate mineral water in moderately hypercholesterolemic young adults. J Nutr Biochem. 2010 Oct;21(10):948-53
  6. Effect of electrolyzed high-pH alkaline water on blood viscosity in healthy adults Journal of the International Society of Sports Nutrition 2016 13:45

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October 21, 2021

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