Which brings us to urine. Urine consists of water and waste products of the body’s bloodstream, which includes ammonia. Depending on the person and whether he or she is dehydrated, diabetic, on a protein diet, or dealing with myriad other conditions, urine may or may not be about as good as fresh water. In fact, urine contains so much fresh water that stranded folks can drink their own urine to survive. Since we know fresh water will often make nematocysts fire, the logical conclusion is that urine will do the same thing.
Research does not support the claims that urine can help treat jellyfish stings. On the Internet, you may find many anonymous bloggers sing praises of this readily available wonder tonic. Others tell stories of urine not working at all.