There is no Clear Requirement for Dietary Carbohydrates for Human Adults

Time to drop the carbs...

The recent landmark study showed that a very-low-carbohydrate diet resulted in a significant reduction in fat mass and a concomitant increase in lean body mass in normal-weight men. Contrary to popular belief, insulin is not needed for glucose uptake and utilization in man. Finally, both muscle fat and carbohydrate burn in an amino acid flame.

Serum lipids generally improve with the low-carbohydrate diet, especially the triglyceride and HDL measurements. In sharp contrast, high-carbohydrate diets, which reduce high-density lipoprotein (HDL) cholesterol and raise triglyceride levels, exacerbate the metabolic manifestations of the insulin resistance syndrome [18]. Finally, all fats raise HDL cholesterol. The relative potency of fatty acid classes in raising HDL cholesterol is saturated > monounsaturated > > polyunsaturated [19]. Thus, it is clear that replacement of total fat (of any fatty acid distribution) with carbohydrates results in significant reductions in HDL cholesterol [19]. Indeed, recent studies of carbohydrate intake and its relationship to the development of CHD and type 2 diabetes have been rather revealing, showing that an increase in carbohydrate intake is related to increases in both conditions [20].