That doesn't work, you get your waste back again.
By the way, did any of you know that doctors in old times before medicine and hospitals drank pee to diagnose a patient?
Complete nonsense. Had no scientific value to it.
Incorrect on both points, if pee is a liquid then you get waste and liquid back, but it doesn't really matter because you'll just be the same as before. Also, tasting pee allowed the doctors to monitor a patient's blood sugar, and depending on how much toxins you expel, it tastes more obvious. (signifying illness)
Edit: Just read the whole topic. God damn. ._.