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 Digestion Of Simple Sugars and Supplemental Digestive Enzymes
Digestion Of Simple Sugars & Supplemental Digestive Enzymes. Article 4 of the Science of Low-Carb & Keto Diets series. Those of us who are trying to lose weight, sometimes lose track of the fact that the body wants to take in food and use it to our best advantage. It does this by digesting the food, thereby making it ready for transfer into the body's tissue cells. The necessary factors are enzymes, which are produced in our bodies for this purpose. Only simple sugars can be absorbed into the cells of the body, and enzymes are necessary to break down the complex carbohydrates to the simple sugar stage.
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