NAD + ndi coenzyme yofunikira m'mayendedwe a ma cell, imagwira ntchito yayikulu mu metabolism yamphamvu, kukonza kwa DNA ndi kukana kukalamba, kuyankha kwapang'onopang'ono kwa ma cell ndikuwongolera ma sign, komanso neuroprotection. Mu metabolism yamphamvu, NAD+ imagwira ntchito ngati chonyamulira ma elekitironi mu glycolysis, tricarboxylic acid cycle, ndi mitochondrial oxidative phosphorylation, kuyendetsa kaphatikizidwe ka ATP ndikupereka mphamvu zama cell. Nthawi yomweyo, NAD + imagwira ntchito ngati gawo lofunikira la ma enzymes okonzanso ma DNA ndi activator ya ma sirtuin, potero imasunga bata la ma genomic ndikuthandizira kukhala ndi moyo wautali. Pansi pa kupsinjika kwa okosijeni ndi kutupa, NAD + imatenga nawo gawo powonetsa njira komanso malamulo a calcium kuti asunge ma cell homeostasis. Mu dongosolo lamanjenje, NAD + imathandizira ntchito ya mitochondrial, imachepetsa kuwonongeka kwa okosijeni, ndipo imathandizira kuchedwetsa kuyambika ndi kufalikira kwa matenda a neurodegenerative. Popeza milingo ya NAD+ mwachilengedwe imatsika ndi zaka, njira zosungira kapena kukulitsa NAD+ zimadziwika kuti ndizofunikira pakulimbikitsa thanzi komanso kuchepetsa ukalamba.