Pepsin is a stomach enzyme that cuts proteins into smaller peptides. Your body makes it naturally, but supplements offer extra support when stomach acid runs low or acid reducing meds get in the way. Most commercial pepsin comes from porcine or bovine sources.
Take pepsin right before or during a meal that contains protein. It pairs often with betaine HCl in formulas designed to shore up stomach acid levels.
Skip pepsin if you have a peptic ulcer or take drugs that alter stomach acid. Stick to the recommended dose to avoid irritating your stomach.
consult a professional.