Bests & Worsts Reviews from Amazon

BEWARE, this product has been substituted for the HPN formulation of Niagen. I'd bought Niagen through Amazon from HPN many times. When I went to "Buy it again", Amazon shipped HPN's NAD+ booster pills. This formulation is just Niacin, a common B vitamin and NOT worth the price being charged for this product, nor is it a known, study proven booster of NAD+ in humans. I returned the product unopened after realizing I did not fully read the listing and purchased some very expensive NIACIN instead of the NIAGEN I sought.