Some friends of mine used it, and supposedly it helped them pass. But man, if you ARE going to take them, eat them on a full stomach! I took one on an empty stomach once, and I broke out in an awful rash for an hour. I looked like a damn tomato, and it felt like I was on fire. I'd only use Niacin as a last resort.
Buffalo Reviewed by Buffalo on . Niacin i have heard that taking niacin will help you pass a piss test for marijuana. is this true? how much do you need? Rating: 5