When I was actively seeing patients it was very clear what my primary responsibility was -- to teach my patients to eat the way their ancestors ate. If I could facilitate that change alone and have them avoid processed foods, trans fats and the ridiculous excess of omega-6 fats nearly all consume, the vast majority of them would have radically improved health.

However, this information should not cause you to worry about the diets of ancestors. First of all, it is likely that they were eating far healthier than you, but even if they weren't your body has incredible, dynamic healing capacities that have the potential to reverse much of the damage.