11/25/2025
There’s one thing for sure in this world, people will use fear to help them sell a product or a concept. We see it all the time in politics, and we look for it when people are selling something on an infomercial, but when it comes in many forms from other markets, it’s not so obvious.
That includes nutrition, and there are many myths about nutrition and health that swirl around the internet and regularly pop up in popular books and the mass media, many are simply untrue. Some have half truths and some may be legit.
A big one, even in the plant-based world of nutritionists, is that we should be alkalizing our body in order to stave off cancer. We are told that excess acidity is the root of all disease; however, let’s look at it a different way.
First off, too much acid in the blood is called acidosis. For those who’ve forgotten their high school chemistry, acidity and alkalinity are measured using the pH scale, which runs from 0 to 14. Zero is highly acidic; 7 is neutral and 14 is highly alkaline—also called “basic.” The pH scale is also logarithmic, which means for example that a pH of 3 is 10 times more acidic than a pH of 4, and a pH of 8 is ten times more alkaline/basic than a pH of 7. Getting cold sweats yet recalling chemistry classes? No worries we covered it in biology too, so there ya go.
Anyway, there are two types of acidosis, each caused by various conditions. One is respiratory acidosis and the other metabolic acidosis.
Respiratory acidosis occurs when there is an accumulation of too much CO2. Now, normally the lungs get rid of a good part of C02 when you breathe out, but sometimes the body can’t get rid of it and then the Co2 begins to accumulate. This can happen if you have asthma, obesity derived breathing difficulty, drug misuse, muscle weakness in the chest, and/or nerve issues which affect the breathing muscles. In the case of respiratory acidosis, you need to be treated and going on an alkalizing diet will not do any good.
The other type is metabolic acidosis. Metabolic acidosis usually begins in the kidneys rather than the lungs. It is most often caused by very high sustained blood sugar levels, such as in diabetes; however too much diarrhea, excessive vomiting, alcohol abuse, COPD (lack of oxygen) and certain diseases such as cancer, heart disease can cause it too. The condition generally exists when the kidneys cannot excrete their acids into the urine.
Yes, exercise can build up lactic acid too, but this is for a short time and is cleared relatively quickly by a healthy liver (heart and brain).
Notice that conditions or diseases were present first. These conditions then caused the acidosis. So, for those of us who have been told that we must combat it by the micromanagement of our intake of alkaline-forming and acid-forming foods (or water), and even take alkalizing substances such as sodium bicarbonate, to make our bodies more alkaline, you have been misled.
So, how about that alkaline water then? The regular pH of water is around 7. So, to make it alkaline you need to add alkalizing agents to the water such as calcium, magnesium or any other trace minerals. This brings the water up to 8, 8.8 sometimes even 9.5 and higher. A bottle can run between $2-5, but you can achieve it by adding your own liquid minerals purchased from any vitamin store.
The myth that we need to “alkalize” our bodies then is flawed, even if we are trying to combat cancer. The idea is based on a fundamental misunderstanding of human physiology. Look, the first place that water goes is your stomach. In order for your stomach to operate correctly it has to be at an acidic pH of around 2, rising to 4 or 5 after a meal. If the stomach becomes less acidic, we absorb less iron from our food, digestion takes longer, and food is not properly prepared for the small intestine.
The first place that alkaline water goes, of course, is your stomach.
Your intestines don’t need to be alkalized either. The acidity of the small and large intestines (except for the last part of the small intestine, which has a mildly alkaline pH of 7.4) is carefully maintained by various digestive secretions and also by beneficial gut microbes that produce lactic acid, short chain fatty acids and other acidifying chemicals from the foods we eat. This acidic environment actually prevents the overgrowth of pathogenic (disease causing) organisms. So, do you want to lower that acidity and expose yourself to more diseases?
Right, I thought not.
Still not convinced? Well, let’s talk about the fungus called Candida albicans. This is the fungus that causes thrush and other uncomfortable conditions. To work properly the candida fungus switches to a more virulent and dangerous form in a neutral-to-alkaline environment. Hopefully by now, you’ll be realizing that ‘alkalizing your body’ is not necessarily a good idea, and if you are acidic it’s a disorder already in bloom that is causing it and treating the condition is the cure, not drinking alkaline water.
One last point, the essential and life sustaining chemical activities occurring in your body occur within a narrow range of pH levels. Messing with them does not make you more healthy or more protected.
But what if you have cancer? Most of the people with a cancer diagnosis have read or heard that “cancer can’t thrive in an alkaline environment.” Right? That’s not entirely true.
Leukaemias and lymphomas do thrive in the alkaline environment of blood and lymph, which have a pH of around 7.4. In fact, there are essential, life sustaining chemical reactions happening in our blood continuously, and they can only happen in a narrow range of pH levels. Maintaining the right pH level is so important to our survival that if it drops below 7.35 or rises above 7.45, the body deploys numerous buffering mechanisms—involving blood proteins, phosphates, bicarbonates, and then the lungs and kidneys—in that order, restore the balance. Taking alkalizing water messes with that intricate system.
And by the way, anything able to overwhelm those buffering mechanisms which was also able to make the blood either too acidic (below 7) or too alkaline (above 7.7) would quickly result in your death.
Therefore, you cannot take alkaline water to be healthier, unless you are simply bringing minerals into the system to help the cells restore their normal function. That way you can make it easier for your body to maintain its different optimal pH ranges, as well as by making healthy food and lifestyle choices. For example, by eating a whole food, plant-based diet rich in fiber and resistant starch from vegetables, fruits, legumes, and whole grains, you’ll provide your gut microbiome with the carbohydrates needed to produce short chain fatty acids that help maintain optimal pH in the colon.
Oh, and that oxygen tank you see on TV for recovery? Yeah, doesn't work either.