Several members of my family have had SIBO. There is a blow test (into tubes) done to determine if you have it. Depending on the results of this test, your doctor may put you on a specific antibiotic, or they may have you take natural supplements. The natural protocol is the one I always try first and it has worked all but once. The 2 supplements are Berberine and Neem. These are the ones I always have on hand so when the signs of SIBO show up, these are given. (My daughter is a carb seeker and she is usually the one that gets it. Bad bacteria feed on carbs.)