That's a good point. There are diets for specific blood typologies that are supposed to work best with your particular body system.

It's anecdotal evidence, but since I've been on my blood type diet, my overall health has improved, I've lost a bit over 22 pounds in the last 2 months, and I no longer feel strange cravings for foods. My particular diet had me cut out the majority of red meat, but increase the fish and poultry as well as significantly increase the amount of cruciferous vegetables (broccoli, cauliflower, cabbage, brussels sprouts, etc.)