Christopher Ellis demonstrates a baking soda test: mix a teaspoon in water, swallow, and time how long until you burp. Low stomach acid can cause reflux through bacterial fermentation that produces gas and opens the LES, so suppressing acid fully backfires.
The baking soda test is you take a teaspoon of baking soda, you put it in a small glass of water, you stir it, and then you swallow it and time how long it takes to burp. A simple test you can do for digestion is to see what your stomach acid is like because you actually need a fair amount of stomach acid to digest food. There's this old idea that too much acid in diet causes reflux, which maybe is part of it, but you can also get reflux from too little acid because basically your body, your stomach is not digesting food and it goes into your small intestine and the bacteria there gobble it up and produce gases, which open up the LES, which is the valve, and cause regurgitation. So, you don't want to suppress your acid to zero.
