Beware of hype and conflicts of interests
Many start their longevity journey with the book Lifespan by David Sinclair. In it, he promotes two anti-aging supplements called NMN and Resveratrol. As such, these two substances are by far the most popular supplements in the longevity community. However, Resveratrol has been extensively studied in the last two decades and scientists have not been able to reproduce the initial positive results that came out of Prof. Sinclair's lab. Resveratrol at the commonly sold doses can possibly do more harm than good.
While the scientific community regards anti-aging claims of Resveratrol as debunked, prominent figures in the longevity community still promote Resveratrol as an anti-aging supplement. Most of them have conflicts of interest.