Supplementation of NAD+ and NAD+ precursors NR and NMN have been able to restore youthful levels, reversing age-related pathology and extending life. It is something I take every day, along with many other top aging researchers. NAD+ (and precursors NR and NMN) may be one of the most powerful discoveries in healthy life extension—it may be as close to the fountain of youth as we can get.