– if carbohydrates are the body’s energy source, what exactly are calories?

Question

I keep hearing that carbs are the body’s fuel, but fats contain more calories per gram. Surely that means fat is the body’s primary source of fuel?

In: 3

Answer 1

The body can use carbs, fats and protein as an energy source.

A calorie is the unit of energy used when working out how much energy is in food made of carbs, fat and proteins.

Fats and protein are also used for other biological processes, so you need to eat them to live.

Carbs are only used as an energy source. In theory you don’t need to eat carbs(see keto diet).