Newmark's Door

Not sure he's correct, but it is interesting:

Accordingly, herein I present the heretical idea that the naïve determinism of ‘Diet-centrism’ — ‘you are what you eat’ and ‘what you eat is killing you’ — is not only simplistic and unscientific but specious because it ignores the fact that individual differences in metabolism (how the body ‘handles’ foods and beverages) is what matters most in diet-related health and disease.