But according to the hormonal (insulin) model of obesity, weight gain will occur much more easily in those who have an impaired capacity to metabolize carbohydrate because their tissues are IR. Thus in those with IR, carbohydrates are especially obesogenic because every time carbohydrates are eaten, they cause an exaggerated secretion of insulin which directs the excess ingested calories to be stored as fat. In addition the carbohydrates specifically cause the overconsumption of calories, not only because they fail to satisfy appetite (as they are usually eaten in foods that are not nutrient
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