You need to do reverse osmosis or distillation to properly filter and purify urine.The more dehydrated you are, the more dangerous. The amount of harm drinking urine will do depends on how dehydrated you already are.In a survival situation, drinking pee won’t help much.It’s mostly made of water, urea, and salt, plus some other trace “ingredients.”.There’s no health benefit to drinking urine, at least none that science has identified.I think that’s an important point which everyone agrees on.” Naturally. If you’re tempted, there’s a cocktail guide, which includes this essential tip: “on’t collect the ‘head’ and ‘tail’ of the stream, only the middle, due to the fact that more impurities may be contained in the first and last parts of the stream. To be fair, urine did have quite a few uses historically, the most ingestion-related one being teeth-whitening (due to the ammonia in pee). Note that people who drink their urine for whatever reason are hydrating normally with ample water, so these practices aren’t quite comparable to survival pee drinking. Even practices that aren’t useful ( spoiler: drinking pee is not useful) can manage to stick around, as long as the activity in question doesn’t immediately, obviously harm its practitioners. Given that urine is a bodily waste product commonly regarded as repulsive, why the desire to drink it? Well, leaving the fetishists aside, humans are curious, and we’ll give just about anything a try in case it turns out to be useful. The practice shows up in ancient ayurvedic teachings, and has been espoused by modern athletes. Of course, survivalists aren’t the only group with a bit of a pee drinking obsession. But long before the British Army SAS veteran guzzled his way to meme glory in a now-infamous episode of his “reality” TV survival show, drinking your own pee was a classic metonym for desperation in prepper/survivalist folklore. If you’ve been on the internet for a minute, you’ve no doubt seen the famous Bear Grylls meme.