7 Reasons You Should NOT Pee in the Shower

Since we're already talking about pee, let's get down to the nitty-gritty. What exactly is in urine? "Depending on how much fluids you take in, about 90% of your urine is water," said Dr. Brahmbhatt. "The rest are salts and compounds that are filtered out of your body." These substances in your urine can vary based on what you drank or ate, medications you have taken, and substances you have used, Dr. Brahmbhatt added. More than 3,000 compounds have been detected in urine, according to a 2013study published in the journal PLOS One.