"[Healthy, natural nutrition and diet: There are] ...two competing theories for the cause of obesity. (1) The first theory holds that high sugar intake increases insulin resistance leading to obesity and diabetes, and increases serum cholesterol leading to coronary heart disease (CHD). So multiple [diet] books have focused on high-fat diets and high-protein diets to reduce sugar intake. (2) The second theory holds that high fat intake raises serum cholesterol leading to CHD, and raises uric acid and impedes carbohydrate metabolism, leading to insulin resistance, obesity and diabetes. So other [diet] books have focused on high-carbohydrate diets to reduce fat intake. There is scientific evidence to support both theories, and some diets do recognize both. "
Laura Power, MS, PhD, LDN
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