Have just finished the above named book. Found it a very different approach to dieting and losing weight. I was a bit of a sceptic but in my case he is spot on.
As a type O I should be eating more of a cavewoman diet. Meat and veg. I should not be having grains and milk.
I have found my dieting progress much steadier and more controllable now that I dont have milk at all. I also used to take wheat bran every day but he says that wheat bran is also not recommended for Type O.
My DH is type A so he should be eating less meat and more veg and grains. Mealtimes are not going to be easy!