I was being the dork that I can be researching stuff and I came across this. What's funny is I've heard of this before, but happened to come across it. There must be some truth to it. I am blood type O and they have a tendency to do better with more meat in there diet. I tend to crave meat quite a bit and my wife is blood type A. She likes meat as well, but doesn't eat it anywhere near as much as I do. She tends to eat alot more grain products and veggies. I eat alot of veggies too, but I tend to always want my meat in my meals..lol! Just wondering if anyone else thinks this influences there diet tendencies? Just thought it was interesting to read. http://www.runtheplanet.com/trainingracing/nutrition/bloodtype.asp