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Originally Posted by fallsauce
Isn't that only true for your own urine? I remember watching a video on Nazi camps and they were talking about it...
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No, any healthy person's urine is essentially sterile, in the sense that there are no bacteria in it. It's possible for it to get contaminated from skin contact as it leaves the body, but that would still be quite insignificant; especially when compared to most other bodily fluids, which are chock full of all sorts of pathogens.
Chemically speacking urine is fairly harmless as well, it's mostly composed of urea with small amounts of uric acid. The latter, in large quantities over a long period of time can lead to gout, but you literally would have to down several quarts of urine every day to achieve that effect.
Once outside the body urine will get contaminated with bacteria fairly quickly, one of the effects there is that urea will be broken down back into ammonia, which is toxic. So, I guess, if there's urine drinking to be done, make sure it's fresh...