Helen Andrews, of the British Dietetic Association, said: "There are no health benefits to drinking your own urine, and in fact I think it could be quite detrimental. Each time you put it back it will come out again even more concentrated and that is not good for health as it could damage the gut. If you are stranded, your body will try to conserve as much water as it can. Drinking your urine would be like drinking seawater."
