Sometimes its good to be careful. Even some baking soda boxes have warnings about using the product as an antacid. It can produce gas, extreme bloating, and over alkanilize the stomach which needs to be in an acid state. I doubt if it really does much to affect the alkalinity of the whole body since once the soda hits the stomach acid it creates lots of gas (CO2). If the stomach is full of food and very acid, the excess gas could damage the stomach itself.
Here are some cautions from one site that started out looking for natural cures, but felt it necessary to warn readers to avoid the baking soda:
One common suggestion has been to mix baking soda with water for a homemade antacid. Others suggest drinking milk to reduce acid.
Land Line staff checked out the suggestions. A variety of university medical researchers and other health organizations warn against using baking soda or milk as a remedy for excess acid. Here are some of the comments we found:
“Solid food and milk are not recommended as antacids. While they may decrease pain briefly, they actually stimulate the secretion of acid … Do not use household baking soda to neutralize acid in the stomach.”
– University of Maryland Medical Center;
“Do not take baking soda (sodium bicarbonate). It tends to make you hold fluid and swell.”
– University of Michigan Health System;
“The sodium content of baking soda is not healthy, particularly for people with heart problems, high blood pressure or kidney disease.”
– The International Foundation for Functional Gastrointestinal Disorders;
Regarding baking soda vs. antacids, “The baking soda will neutralize more acid … (But) It turns out that the antacids are best because you would not want to completely neutralize your stomach acid. … If a person ingested too much baking soda, they could actually be in danger of changing the pH of their stomach and blood dramatically. … For example, we would not be able to digest our food properly if our stomach was not at an acidic pH.
– Indiana University Chemistry Department;
“Although these liquids (baking soda in water and milk) create temporary relief … eventually they aggravate the situation by adding gas and fluid to your stomach, increasing pressure and causing more acid reflux. Further, adding more sodium to your diet may increase your blood pressure and add stress to your heart, and excessive bicarbonate ingestion can alter the acid-base balance in your body.
– Mayo Foundation for Medical Education and Research;