Nad+ side effects: what science really says about safety, injections, and anti-aging hype
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Nov 29, 2025 · 13 min read
NAD injections are marketed as a shortcut to better energy, sharper focus, and longer life. The science is promising but early, and there are real limits, costs, and side effects you should understand before you sign up for NAD shots. “NAD+ is central to how your cells make energy and repair damage, so it makes ...