Hi
This one is for the paleo experts out there. Do you think dr adamo's blood type theory is a scam? He reckons blood types evolved as our diet change, although he says blood types may have changed as long a go as 6 million years, the consequences of food choices ever since and ariculture have set people up to be gentically set for certain foods. He reckons one vegetarian tribe in africa have their own unique a blood type and that nearly all american indians were o. I'd be interested to know if this is bull **** and if so, why do we have different blood types?

Thanks for any help guys