Just another episode from Man vs. Wild starring Bear grylls that I have watch. In this episode he drinks his own urine to avoid dehydration when you are in the desert. The average person can survive 3-5 days in the desert without water, and even less in extreme heat. Finding water is absolutely critical. If you're out of water but still relatively hydrated, drinking your own urine — as horrible as that sounds — can keep you alive.

 

For me It sounds logical enough: When there is no water to be found, you can drink your own pee. Your body will just re-filter the bad stuff and extract the usable water, or so the logic goes. After all, when would resorting to this otherwise verboten act be more necessary than in the desert when you’re dying of thirst?