I read “Why Stomach Acid Is Good for You” and I found it to be a life-altering book.  I may write a full book review but to get some of the main ideas here is a quick 9 minute video on the main points:

• many people have too little, not too much stomach acid
• too little stomach acid leads to malnutrition, which leads to other issues
• medications for heartburn treat symptoms but may exacerbate underlying causes
• stomach acid output can be measured/tested but almost never is
• heartburn/acid indigestion/acid reflux/GERD as well as problems arising from nutrient deficiencies can often treated successfully with hydrochloric acid, pepsin, and vitamin b12 supplements