calories are a term from the physics-level description and nutrients are a term from the biochemistry-level description.
Um, no. Nutrients are things your body needs to function. Some, but not all, of them can be burned for calories. They can also be used for other things.
Um, no. Nutrients are things your body needs to function. Some, but not all, of them can be burned for calories. They can also be used for other things.