I tried that diet for a while. It tell everyone (regardless of blood type) to didge sugar and grains. That makes everyone feel better. Tada!!
I'm type A. Luckily i never went vegatarian as D'adamo suggested for my blood type. I seem do very well on lots of red meat and dairy. All thing to avoid

Now that I think about it just about everything I eat nowadays are to be avoided for my type.
D'adamo's so called "history of the blood types" is pure fantasy. Science has proven beyond a single shad of doubt that type A is the oldest blood type. Type a was already present 8myo yrs ago when whe were stil chimps.
So its not O for old but A for ancestral
