Some friends of mine, who were really overweight bought a book based on
eating for their blood type. It appeared that he thrived on high protein, and
she thrived on wheat and other 'thingies'.
They lost the weight and both have continued (more or less!) with the same
diet.
When I asked about my blood type, it appeared that all the diets
were for the Rh.Positive Type Groups.
It would be interesting to find out if the book has been updated for the
Rh.Negative Type Groups.
Interesting subject.
Cheers