Apparently Lyoto Machida isn’t the only pro fighter who drinks his own urine. So does pro boxer Juan Manual Marquez as seen in the above clip from HBO’s “24/7 Mayweather/Marquez.”

But why? They say their urine is chock full of vitamins and nutrients, but is it really? We’re talking about piss here. MMA Junkie’s Doc Benjamin answers by asking the obvious question.

Urine is 95 percent water, 2.5 percent urea, and a 2.5 percent mixture of minerals, salts, hormones, enzymes and non-toxic waste products.

The practice of drinking urine is certainly not new or limited to a few modern practitioners of combat sports such as world champions Lyoto Machida in MMA and Juan Manuel Marquez in boxing. China, India, the Middle East and Rome all have ancient and modern writings that discuss the willful consumption of urine.

Although the potential benefits and healing capacities of drinking urine have been encouraged for centuries by many cultures, there is no credible medical literature or studies that support these beliefs.

Drinking your own urine may reclaim a small bit of water, but if the body didn’t want the other five percent (waste products and the like) during the first time, why would it want it the second time around?

Wouldn’t it be easier (and probably considerably tastier) to just sip a tall refreshing glass of H20?

Did we even have to ask?