In the 1600s, the father of modern chemistry, Robert Boyle, advised certain patients to drink a “moderate draught of their own urine” each day. Although you might grimace at the thought, the fact is that urine therapy (aka auto-urine therapy)—the drinking of your own urine or applying it on your skin—has historical roots in Egypt, China and India and is still popular throughout the world today. Urine, which is 95 percent water and 2.5 percent urea along with salts, enzymes and minerals, is believed by practitioners to have health enhancing powers—everything from relieving allergies to boosting the immune system. Former Prime Minister of India Morarji Desai, who died 10 years ago at age 99, drank a glass of urine every day and massaged and washed himself with it, according to “Gold Fountain: Complete Guide to Urine Therapy,” by Coen van der Kroon. British actress Sarah Miles has stated that she’s been drinking her own urine for more than 30 years.“It’s wonderful for your skin, fantastic for your hair, your immune system—it’s fantastic for everything,” she has said. Some baseball players urinate on their hands to treat calluses, while many boxers have been known to drink their urine for performance enhancement. Urine therapists suggest that morning urine caught in midstream is best and that it should be sipped, not guzzled.