There's a debate among users of the NAD precursors NMN and NR, and some scientists who study these two molecules and their effect on boosting NAD, about which better increased NAD levels in the body. Perhaps the best approach is to take both.

New research found that nicotinamide mononucleotide (NMN) supports brain, metabolic, and mitochondrial health in five key ways. 

Anti-aging supplements NMN, trans-resveratrol, TMG, berberine, and pterostilbene work well individually, but when stacked together, they combat oxidative stress and increase metabolic function synergistically to enhance your healthspan.

Supplemental NMN has been shown in animal studies to improve blood vessel health and integrity, reduce oxidative damage in the heart and blood vessels, and protect the heart against damaging events.