Why is urine sterile?

Urine is the body’s way of removing toxins and waste from the blood. It’s secreted by the kidneys, stored in the bladder and leaves the body via the urethra. The kidneys are essential in filtering out toxins that could build up in the blood and are very good at it. Assuming a person is healthy, their urine will be sterile when it leaves the body. If the urine is left alone, bacteria may develop in it. Freshly passed urine from a healthy body can sometimes be safe to drink – in fact, doctors even used to test urine by tasting it.