Gabe Mirkin, M.D.
Have you seen advertisements for products such as coral calcium or alkaline water that are supposed to neutralize acid in yourbloodstream? Taking calcium or drinking alkaline water does not affect blood acidity. Anyone who tells you that certain foods or supplements make your stomach or blood acidic does not understand nutrition.You should not believe that it matters whether foods are acidic or alkaline, because no foods change the acidity of anything in your body except your urine. Your stomach is so acidic that no food canchange its acidity. Citrus fruits, vinegar, and vitamins such as ascorbic acid or folic acid do not change the acidity of your stomach or your bloodstream. An entire bottle of calcium pills or antacidswould not change the acidity of your stomach for more than a few minutes.
All foods that leave your stomach are acidic. Then they enter your intestines where secretions from your pancreas neutralizethe stomach acids. So no matter what you eat, the food in stomach is acidic and the food in the intestines is alkaline.
Dietary modification cannot change the acidity of any part of your body exceptyour urine. Your bloodstream and organs control acidity in a very narrow range. Anything that changed acidity in your body would make you very sick and could even kill you. Promoters of theseproducts claim that cancer cells cannot live in an alkaline environment and that is true, but neither can any of the other cells in your body.
All chemical reactions in your body are started by chemicalscalled enzymes. For example, if you convert chemical A to chemical B and release energy, enzymes must start these reactions. All enzymes function in a very narrow range of acidity. (The degree ofacidity or alkalinity is expressed as "pH."). If your blood changes its acidity or alkalinity for any reason, it is quickly changed back to the normal pH or these enzymes would not function and the...