<<Disclaimer: Verify this information before applying it to your situation.>> I want to encourage people who may be on the fence about trying the GF diet -- or whose doctors may be against it -- to try it. Apparently, either there are forms of CD that don't show up on blood tests and biopsy, or there are forms of gluten intolerance which cause diarrhea, gas, depression, low energy that are not CD. Anyway, after several months eating GF I feel SO GOOD, after feeling SO BAD. All my CD tests were negative. I think I have been poisoning myself with gluten all my life, or at least the past 20 years. Last January all the above symptoms went from background/tolerable to foreground/incapacitating. I had never even heard of gluten intolerance. It has taken months to recover fully after starting on the GF diet. I started feeling better right away, but not all better. Then, I reintroduced some gluten and had a relapse, which has taken months to recover from. The latest event is I suddenly dropped ten pounds that I didn't need (without trying to) and feel 20 years younger. Hope this helps someone w/similar problems.