Andrew Huberman· PhD
So all of your carbohydrates in your body come in the form of long carbon chains. In fact, that's what a carbohydrate means. It is a one carbon molecule that has one water molecule attached. It's a carbon that has been hydrated. In the case of like glucose, blood sugar, let's say six carbon molecule, right? In terms of fat, which are the only two places you're going to get most of your cellular energy carbohydrates into fat, that is also a big long block in chain of carbons. So whether you're getting your energy from fat or carbohydrate, you're going to split those atoms. So in other words, you've got six carbons attached to each other, and in this part of chemistry it's exergonic. So when you break that carbon bond, so break one of those carbons off from the other, that's going to release energy.