All products are selected independently by The Looker’s editors. If you click or purchase something from our post, we may earn a small commission.From IV drips to nasal sprays, NAD+ (nicotinamide adenine dinucleotide) has become a star ingredient in the anti-aging and longevity space. NAD+ is a naturally occurring molecule produced by the body, and, much like collagen, elastin, and certain hormones, its levels decline with age. While intravenous and subcutaneous administration of NAD+ may help address concerns such as low energy, poor recovery, and dull skin, oral NAD+ supplements themselves have not been shown to be particularly effective. On…