Question

Why does humans only burn fat and not sugar

Answer 1

sugar is in our blood stream, you can’t “burn” anything out of your blood stream.

Answer 2

Exercise lasting from 10 seconds to several minutes uses predominantly glucose in the form of pyruvate, and if the exercise is intense enough, in the form of lactate. After several minutes of work, the body will begin to burn fats for energy use. Share This: The body will burn sugars first, always.