“…The fourth paper addresses the latest research examining whether there may be some benefit from ingesting dietary-derived nicotinamide adenine dinucleotide (NAD + ) precursors, which may increase the NAD + content in skeletal muscle where it is a vital energy intermediate [ 4 ]. Nicotinamide riboside and nicotinamide mononucleotide supplements have been shown to display a health benefit in humans with clinical NAD + deficiencies.…”