Harvard Doctor reveals #1 Cause of Aging You've Never Heard Of | Dr. Andrew Salzman

In this episode of The Dr. Josh Axe Show, Dr. Josh Axe sits down with Dr. Andrew Salzman, a Harvard-trained ICU physician and pioneering researcher in NAD, cellular energy, leaky gut, and longevity science, to uncover one of the most important shifts in how we understand aging: your body may not simply be “wearing out” — it may be losing the energy and repai…