Pro-Niacin, a patented derivative of niacin, is the key ingredient in the Nia24 patented continuous skin cell delivery system. Available only in Nia24 skin care products, it allows around-the-clock delivery to skin of effective levels of niacin that can benefit the health, look and feel of the skin. Pro-Niacin is specifically designed to enable the niacin to be efficiently converted within skin cells to its active form, nicotinamide adenine dinucleotide or NAD. Pro-Niacin has been chosen by the National Cancer Institute (NCI) of the National Institutes of Health for development as a skin cancer prevention agent. www.nia24.com