[Addict]

I know the answer, but I'd like to see what you guys guess it to be without looking it up.

Which of the three big macronutrients is nonessential? In other words, you don't need it to live or your body can produce it on its own or from the others. I'm not trying to prove a point with this poll, but I think it'll generate some interesting discussion.

I actually got the idea after having an argument with a friend about this.