(Extracted from article)
As good as this may sound, "In a world where it takes 3,500
calories to work off a single pound of fat, feasting on celery
would make only the merest difference."
Celery is not the only so-called negative-calorie food out there.
If properly prepared, digesting cauliflower, cucumbers, spinach,
and many others can cause your body to burn more calories than you
ingest.
And for the record, celery with peanut butter or ranch dressing
does not count as a negative-calorie food!
Muahahaha....they all don't taste nice on their own. 
