Niacin is vitamin b3. It makes your pee neon green, not yellow. It really freaked me out the first week i took my vB pills.

This doesn't clear out your system, water does. Drink lots of water and exercise a lot, that clears out your system. the Niacin is to make your pee less clear and more yellowish.
moeburn Reviewed by moeburn on . what vitamin is it what vitamin is that cleans out your system :pimp: Rating: 5