Is urine sterile and, if so, does urine have any practical uses?

Urine is not completely sterile, as it contains trace amounts of bacteria and other microorganisms. However, fresh urine from a healthy individual is generally considered to be relatively low risk for transmitting infections. As for practical uses, urine has been used for centuries in various applications. For example, in ancient Rome, urine was used for cleaning clothes and tanning leather. In more recent times, urine has been used as a fertilizer, due to its high nitrogen content. Some athletes have also used urine as a weight loss aid, although this is a dangerous and ineffective practice. Overall, while urine does have some practical uses, it is important to handle it with care and caution to avoid potential health risks.