Ok, don't laugh, I don't believe in that stuff.
The question that bothers me is why is the "Blood type diet" so well-known. Is there any scientific base? Any research, studies, references? When I hear someone talking about how we should eat according to our blood type, I would like to say that it's huge BS, but how do I answer to the question "why is it BS?"
Is it really just some guy who came up with the idea, did not back it up with any evidence and is now popular around the world for no reason?
This from wikipedia:
One criticism of D'Adamo's hypotheses and recommendations claims that he provided inadequate evidence. For example, his first book, Eat Right 4 Your Type, published in 1997, contains only a bibliography. While his subsequent books have provided thorough references for the classifications of various foods within his categories of "beneficials", "neutrals" and "avoids", his specific process and reasons for reaching these conclusions of classification remain undocumented.
Also, by limiting the very complex human beings to just four limiting stereotypes, the blood type diet has been likened to a "blood type astrology".
The last part made me LOL...
I have tweaked the two together and eat a Paleo/Blood Type hybrid diet and feel better than when I was doing just paleo. Some fruits, veggies and meats don't agree with me and D'Adamos lists of which ones I should avoid were spot on of the ones which were causing me problems.