Anyone hear about this? It sounds way too simplistic. Seems to be based on the idea that people with certain blood types have evolved at different speeds. O type blooded human are the oldest strain basically based on what our hunter ancestors ate. AB type blooded humans are the most recent strain and reflect what should be eaten by city dwellers.
You are supposed to eat stuff on what is good for your blood type which is based on evolutionary strains.
http://en.wikipedia.org/wiki/Blood_type_diet
Cannot really buy this reasoning. Has all the scientific validity IMHO of those people who used to gather information on bumps on heads and then give medical advice based upon the shape of the cranium.