Niacin is a very interesting vitamin. its actually a b vitamin that is beneficial in many ways. Not only does it lower cholesterol, but it helps with blood flow, can be used as a way to appear darker (as opposed to tanning) and is actually the main ingredient in Extenze.

When it comes to flushing THC, i doubt it will have little or any affect. This is probably a misunderstanding of the bottle. Some will say "Flush-Free". This simply indicates that you won't experience the mild "sun-burn" aka flushed look while taking it.

In addition to a multi-vitamin, i take 300 mg's of niacin and 15 mg of zinc daily. Zinc increases testosterone and niacin increases blood flow. give it a try. along with a good amount of water, that combo is a great way to stay healthy and keep ur chick happy.