NAD+ levels naturally decline significantly as the human body ages, which impairs cellular repair mechanisms, mitochondrial efficiency, and skin elasticity. While replenishing NAD+ through precursors or clinical therapies can support overall cellular health, energy metabolism, and tissue vitality, it is not a miraculous cosmetic cure for aging. Users often report improvements in general vitality, skin recovery, and wellness, but results vary widely depending on genetics, lifestyle, and baseline health status.