Fat Extinguisher When Harvey Diamond co-authored Fit for Life, he helped bring the concept of natural hygiene into the mainstream. This way of eating isn't just about how much you eat but also when and how you eat it. This regimen is based on the principle of proper food combining. The idea is that different foods are broken down differently by the body and therefore should be eaten separately. Harvey Diamond makes a distinction between live foods (high-water-content food like fresh fruits and vegetables) and dead food (e.g. processed foods).

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