Protein as well, Our bodies roughly prefer to burn sugar, fat then protein but if all that's available is protein we'll metabolise that (including our own in starvation scenarios).
That preference is at least in part because if you don't burn the sugar it needs to work to store it as fat. Excess fat in the bloodstream isn't a big problem short term like sugar is. (Long term is different )
Also ethanol. 7 kcal per gram.
Basically rocket fuel for our body on a Friday night.
7 calories, not 7000!
1 colloquial or dietary calorie is indeed 1000 scientific calories or 1 kcal.
And protein!
What about hydrogenated carbon, for extra confusion.