Appetite is the desire to consume food, but sometimes, how hungry we feel can be all in our heads. Knowing what causes cravings — especially when the body doesn't necessarily need more food — is an important step in maintaining healthy food consumption. So before reaching for an extra serving or three (even if it's a <a href="http://www.greatist.com/superfood/"> superfood</a>) find out more about cravings and appetite control here: