What's A Calorie? (And More Nutrition Buzzwords Defined)

There are a lot of terms that get thrown around in health articles. But do most of us actually know what they mean? Of course you can use the word calorie in a sentence, you know you don’t want too many or too few of them -- but what are they? Here, your back-to-basics cheat sheet.

HuffPost blogger and Medical Advisory Board member Dr. David Katz, M.D., contributed to these definitions.