Lately, I'm about 10 lbs overweight vs. last year although I'm doing the exact same workout routine and I'm eating about the same foods. The only thing different is that I've been eating more natural peanut butter, which I thought would be better for me if anything. Then I read this article: http://hubpages.com/hub/Ten-Differen...se-Weight-Gain I'm starting to think that I'm allergic to nuts and it's causing weight gain. Does anyone know of a way to test this? Would an allergy test pick up this kind of result?