There seems to be a belief (possibly myth) that the energy required in eating (chewing and digesting) celery is actually greater than that which is provided by celery as food.
I’ve searched on this on the boards and although it appears to come up in discussion occasionally there appears to be no conclusion as to whether or not this is true…
Well, celery has about 100 calories a pound. If your body burns about 2000 calories a day, that’s 20 pounds of celery.
Even if I didn’t get sick of it, and notwithstanding the fact that I wouldn’t be getting a lot of the vitamins and minerals I need, I don’t think I could eat 20 pounds of anything in a day.