I was diagnosed with Crohn's Disease of the small intestine 4.5 years ago. The disease manifests itself in only 1 particular spot of the small intestine causing EXTREME pain and Bloating when I eat a trigger food, usually gluten or dairy. After reading up on several herbal remedies for intestinal healing and trying probably a thousand or more dollars on all of them, a combination of Jarrow's NAG and Swansons Zinc Carnosine have been the ONLY combo that gets me through my day pain free. I take one NAG in the morning and 1 at night before bed. It has kept the intestinal discomfort in check and although I am not cured (remember, there is NO cure for Crohns), I am able to function without any pharmaceuticals or immunologics. This supplement literally changed my life along with the Zinc Carnosine. If I don't take it, I feel the pain, so for now, I pretty much plan on taking this forever