For many thousands of years, humans survived as hunter-gatherers. Only in the past several thousand, an evolutionary blink of the eye, have we shifted to a diet in which grain-based, high-carbohydrate, and high-sugar content foods dominate our food supply. Even more recently we began to eat the vast amounts of highly processed and refined (highly glycemic loading) foods that now make up the bulk of the modern diet.
Before anyone accuses me of being some crazy ‘Paleo guy,’ remember I started consulting in the nutrition field before Paleo was cool, back in the late 1990s. But as a rationalist and a scientist, it makes sense to look at remaining (or recently remaining) hunter-gatherer populations for some of the best evidence of not only how humans have eaten over the course of our progression as a species, but also how this affects health, and what we should be doing now.