For anyone interested here's the questions to determine your metabolic type.

The results given can be a clear indication that your one type alone or that your one type with a bit of another, i.e. your a clear protein type who might do best on Neaderthin or your a protein type that needs a little or some carbs or carbs of certain types. Additionally you could be a carb type who needs non fruit carbs but carbs from grains. And then there's the whole question of which kind of fats you'd do best on...those from dairy...proteins...or vegetable fats.

The book's point is that each person can be anywhere on the continuum of protein:carb:fat needs and from different sources. It's a very individual thing.