Hi all. I'm curious about the science behind this. Is there any? I've taken enough genetics courses to understand antigen-based blood typing, but I don't understand how the author can relate this to metabolism. Unless the genes are literally linked very closely on the chromosome, how could blood type possibly be any more related to metabolism than blond hair, brown eyes or freckles?

I'm a cheapo and I refuse to buy a book unless I'm first convinced that the theory has some science behind it. If anyone can breifly enlighten me, I'm all ears. (eyes?)