Does eating celery really burn calories?

A stick of celery contains about 6 calories. Chewing and digesting it will only take half the calories. However, the rest of your metabolism doesn't just stop because you're eating celery, and a 2016 study found that a stick of celery provides 19 fewer calories than you normally burn during the time you eat it.

So you'll still be starving on a celery diet, more slowly than not eating at all.