my friend was a US Marine and he took Niacin to pass the test... although they dont test every person, just a few samples from random people, and if anyone in your little group fails, you all get fucked. they cant afford to test each marine....
anyways, he took niacin until he was completely red, head to toe... he looked like Dr. Zoidberg or whatever from futurama... red as a lobster.
i cant believe that shit does anything... its gotta be hard on your body... if you stood within 3 ft of him you could feel how much heat his skin was putting off... i thought he was going to die...