Brief Answer: Tough to Say Detailed Answer: Estimating how long someone may live is very difficult. It’s usually said in ranges; hours to days, days to weeks, or weeks to months. It’s important to realize that every situation is different, that many factors are involved, and that everyone responds differently. Fluid intake has the biggest effect on immediate survival. Our bodies tend to have several weeks worth of reserve energy from food stores, but lack of fluid causes problems with kidney function within a few days. When someone is no longer taking in any fluid, and if he or she is bedridden (and so needs little fluid) then this person may live as little as a few days or as long as a couple of weeks. I hope this helps. Feel free to follow-up about this or anything else. Vinay

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