How long can a person live without food and water or air?

Dying of Thirst

Water is an essential molecule for life. Depending on your age, gender, and weight, you consist of around 50-65% water, which is used to digest food, carry oxygen and nutrients through the bloodstream, remove wastes, and cushion organs. Since water is so critical, it should come as no surprise that dying from dehydration is an unpleasant way to go. Oh, in the end, a victim is unconscious, so the actual dying part isn't so bad, but that only occurs after days of pain and misery.