find out your blood type and check out this site:
http://www.webmd.com/diet/blood-type-diet - yes, it is a tough diet to be on, but I figure, losing my colon is a lot tougher. I have cut out coffee, gluten, corn, white potatoes, strawberries, legumes, and dairy (among other things if you want to get into details, get the book). I do have chocolate (I switched from milk to dark), butter, and I make my own chocolate chip cookies. I do use the gluten free flour that contains tapioca and potato starch, but I add almond or walnut flour to it, so I don't have too much of it. Green leafy vegetables, beef, fish, almonds and walnuts, avocado, blueberries and bananas....and let me say that you have to pay attention to how things effect you. The book "Live Right for your Blood Type" says I should have green tea, but I find that any caffeine (beyond what I get in chocolate, bc I refuse to give it up) causes constipation discomfort for me. The book is merely a very helpful guideline. We are all different. It just gives you a jumps start. Do you need the supplements? I didn't buy them until recently, so no. My doc recommended vit D, iron, and calcium, plus ground flax seed. So I have taken those. But the biggest reason why I support this diet is because of this: I was bleeding from my rectum. I went to a doc for a colonoscopy thinking I just had hemmrhoids. He told me that he was pretty sure I had Crohn's. The next day, I went strict on the BTD, and the bleeding was gone within a week. Any time I go off the diet, I get bleeding. Since then, I have been diagnosed with Ulcerative Colitis, and my last colonoscopy was clean.