Well, it seems like this surgery really altered things, as I have tested positive for SIBO now. Urine and stool test show some weird results as well, so am really trying to eat a clean healthy diet along with some supplements. The HCL is really adding acid to your stomach to help break down food better given that my surgery diverted bile away from the stomach. If you can't break these foods down, then less can be absorbed according to my functional doc. The less that is absorbed, the less the mitochondria have access to in order to build back up from being damaged. You can get this OTC, but I got mine through my functional doc. Worth a try, I seem to be eating more variety of foods now when I take this as compared to before.