The majority of the human body is made up of molecules that contain H,
C, O, N, and P. In your own words why is a diet of only carbohydrates insufficient for long
term survival?
In the absence of carbohydrates in the diet, your body will convert protein (or other non-carbohydrate substances) into glucose, so it's not just carbohydrates that can raise your blood sugar and insulin levels. If you consume more calories than you burn, you'll gain weight.
