So far as I know, the oldest in the English language at least, is Banting's Letter on Corpulence. Having lost weight and dramatically improved his health on a low carbohydrate diet. Banting wrote and self-published the book back in the Mid-Victorian era, and he distributed it for free.
Read More »The Death of Davy Jones by Dana Carpender
The death of Monkee Davy Jones, a runner and a vegetarian, is a melancholy thing for this Baby Boomer. I've seen various explanations invoked: Notably absent from the discussions I've seen, however, is another, very simple possibility: Neither vegetarianism nor running is particularly healthful.
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