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 »Gelatin as a Supplement by Dana Carpender
I have a new dietary discovery that has me more excited than anything since low carb itself. I have, for two weeks, been taking gelatin as a supplement. Just plain gelatin, the stuff you'd find in a box labeled "Knox" or similar at your grocery store. (Gelatin is available from CarbSmart here.)
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