Harvard School of Public Health: “The low-fat, high-carbohydrate diet recommended by the . . . USDA Food Guide Pyramid may be among the worst eating strategies for someone who is overweight. . . . People on low-fat diets generally lose about two to four pounds after several weeks, but then gain that weight back even while continuing with the diet. Randomized trials of weight loss usually show little net weight changes after a year.”

In the USDA’s Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (the document on which all government and related organizations base their nutrition practices) it is stated that “Compared to higher fat intakes, low fat, high carbohydrate diets may modify the metabolic profile in ways that are considered to be unfavorable with respect to chronic diseases such as coronary heart disease (CHD) and diabetes. . . . This metabolic pattern has been associated with increased risk for CHD and type 2 diabetes. . . . In sedentary populations, such as that of the United States where overweight and obesity are common, high carbohydrate, low fat diets induce changes in lipoprotein and glucose/insulin metabolism in ways that could raise risk for chronic diseases.”