Drinking urine is generally not safe or advisable. Although urine is mostly water, it contains waste products, salts, and toxins that the body is trying to expel. Drinking urine can increase dehydration because it contains a higher concentration of salts and minerals than seawater, which can make thirst worse and put strain on the kidneys. Additionally, urine is not sterile and may contain bacteria that could cause infections. Therefore, drinking urine can lead to nausea, vomiting, diarrhea, and other health issues. In emergency survival situations, it is better to find other sources of water or use methods to purify urine by distillation rather than drinking it directly. There is no medical or scientific evidence supporting health benefits from drinking urine, and survival guides generally advise against it.