The book, death by food pyramid, led to the the idea of inherited enzymes, and how it shaped the diets of our ancestors.

I did a geographic analysis and that explains why I do well on a low plant diet, Carnivore but not exclusively. My ancestors were eating lots of high mountain/North Atlantic patterns.

That's what works for me now. A sibling might have gotten a difference mix. But none of us will do well unless we eat low carb.