Nicotinamide riboside (NR), a form of B3, is used for its anti-aging effects. But a study by the University of Missouri-Columbia found that the supplement may increase the risk of cancer.Nicotinamide riboside (NR), a form of B3, is used for its anti-aging effects. But a study by the University of Missouri-Columbia found that the supplement may increase the risk of cancer.Read MoreHealth News | Mail Online