Celery is OK
It has a slightly odd taste, but is nice and crunchy. It also takes more energy to digest than is gained from eating it, and so is in effect a negative calorie food.

So it's not a good survival food - you'd die more quickly if you ate only celery rather than eating nothing at all (assuming you had drinking water available). It is however a useful diet foodstuff for that same reason.
( K2k6 has a proper job these days, Fri 26 Sep 2008, 12:19, Reply)