One of the many causes of Gastro Esophageal Reflux Disease appears to occur from lack of proper stomach acid production. I know that is opposite everything you have ever heard from mainstream medicine. Most people are told that they have too much stomach acid, which causes GERD. You see advertisements all the time on television for acid reducing medication like proton pump inhibitors.
Read on at http://www.apple-a-day-clinic.com/Health_and_Nutrition_Blog?m8:post=how-raising-stomach-acid-can-improve-your-digestion