True story, according to the next possible world light heavyweight champion via Tatame.com:

"My father [drinks his own urine] for a long time and bring it to us. People think it’s a joke (laughs). I never said it in the United States because I don’t know how the fans will react (laughs). I drink my urine every morning like a natural medicine."

Some secrets really are better left unsaid. Don't really have much to say about that, considering how rank concentrated morning pee can smell. We'll therefore let you handle things in the comments section below.