It's basically saying that what we thrive from, foodwise, is decided by our bloodtype. In general (very broad terms) it goes something like this.. (the examples are just some of them, you would have to look into it to see all the products for your bloodtype)
O-type: Hunter, thrives on intense physical motion and animal protein.
Good food: Red meat. Lamb. Broccoli. Neutral: Turkey. Chicken. Bad: Pork. Bacon. Turtle (whaat?).
A-type: Gatherer, benefits from a more vegetable orientated diet.
Good food: Soya products. Vegetables. Pineapple. Neutral food: Turkey. Chicken. Eggs. Bad food: Meat. Diary products. Beans.
B-type: Nomad, a more robust diet.
As I have understood it, the best diet for our bloodtype is to mix 'good food' (which are supposed to have some healthy benefits) and 'neutral food'.
Most of this information is from the book 'Bloodtype dieting' by Dr. D'Adamo.
Honestly, I am a bit confused with it all. As it is quite alot to consume

Just wondered if anyone has tried living on this bloodtype diet, and if so, what kind of results have you experienced? Would be especially interesting to hear of any sport benefits or similar experiences.