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great product

Posted by iHerb Customer on Aug 14, 2017 | Verified Purchase

This is immediate blood flow enhancing variety of vitamin B3 (niacin), that is , nicotinic acid. The flush sensation in the head is noticeable after 20 minutes.

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Good flushing niacin

Posted by iHerb Customer on Jun 20, 2017 | Verified Purchase

I gave this a 4 star because it contains magnesium stearate. Wish there were more products without unnecessary fillers!

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