I read on the Internet that to determine if a person had low stomach acid for "empty stomach bloating", the person should take a level teaspoon of bicarbonate soda in water and watch for belching. I followed that procedure and never belched or burped, etc. Is this a reliable home test to determine low stomach acid? What test can a doctor (and what type doctor), have performed to determine low stomach acid? My stomach bloating (on an empty stomach) has been happening for a year.