I believe when you say stomach acid is good for us. I would even say that excessive stomach acid is rarely a problem. Its low stomach acid that's a problem. My candida started after my doctor gave me stomach acid suppression drugs for my SIBO symptoms. My SIBO wasn't even that bad at that time. 5 days of taking the acid suppression drugs resulted in full blow candida. And the worst part is that every doctor keeps diagnosing me with excess stomach acid (acidity) because of my excessive belching and keeps prescribing me PPIs.