You can throw all the scientific "proof" you want at me. It's unnatural and just a plain bad idea to drink urine.

The reason why we urinate it to expel toxins from the body (same reason why we sweat and expel solid wastes). It only makes sense that taking in the concentrated toxins our body is trying to get rid of is counter productive.

(And yes, there are other reasons why we sweat and expel solid wastes as well.)

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"The true measure of a man is how he treats someone who can do him absolutely no good."

--Ann Landers