I think it's a fairly uncontroversial part of what most people classify as Ayurveda, yes.
>>Mahatma Gandhi believed urine-guzzling "purified his soul," and Moraji Desai (India's Prime Minister from 1977-1979) proudly drank a glass every morning until his death at age 99.
It's hard to know how it works. Is it hormesis (resistence- stimulation through small doses of toxin), replacement of desirable nutrients and/or hormones (yes there are hormones in you pee)? My guess is "all of the above plus other stuff we don't know about" :)