Michel Montignac (1944 – August 22, 2010) was a French diet developer who originally created the Montignac diet to help himself lose weight, which he based on research that focuses on the glycemic index of foods, which affects the amount of glucose delivered to the blood after eating. The diet, which distinguishes between good and bad carbohydrates, became the basis for best-selling books and a chain of restaurants and stores promoting his diet regimen and was one of the theoretical predecessors of the South Beach Diet.
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