“The food you put into your body is the single most powerful factor that determines your health and well-being. … I was transformed from a chronically ill young man to a person who could be considered the picture of health. At fifty-nine years of age (I was born in 1947), I continue to reap the benefits of fueling my body with the right foods. How many grandpas do you know who regularly windsurf in the deep blue ocean or strap their grandson into a backpack to carry him on a mountainous hiking adventure? Because of proper diet, this is the kind of health I enjoy today.”

— John A. McDougall

Digestive Tune-Up (Healthy Living Publications, 2006), Introduction, pp. x https://books.google.it/books?id=EVql0RH7LwwC&pg=PR10-xi.

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John A. McDougall5

American physician 1947

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