If we have too much stomach acid we can create a hiatal hernia syndrome. Good bacteria or flora grows under alkalinic conditions. Alkaline is 7.0 or above ph. Most people have a urine low ph of 5 or 6 so it's good to try and bring it up. The stomach ph should be more acidic of course.
The book alkalize or die by Baroody is interesting and discusses the role of small intestine for creating the enzyme chyle. By knowing what is acidic and alkalinic we can try and balance our diets.