look younger · feel younger · be younger
Premise
Aging is not a single switch that flips. It's a set of processes, and many of them respond to the choices we make. Growing Young walks through those mechanisms in plain language — from a doctor who reads the studies — and lays out what the science suggests about slowing them. The new 2026 edition broadens that considerably, with deeper, practical coverage of the non-drug, non-supplement levers that move aging most: exercise, sleep, and daily habits.
What you'll take away
- How aging works at the level of cells and systems.
- The daily inputs that move the needle most: food, movement, sleep.
- Where hormones fit, and what the evidence does and doesn't support.
- How to tell real science from anti-aging hype.
Editions
- Available now: the current edition, on Amazon in print, Kindle, and audiobook.
- Coming 2026: a fully revised edition — expanded with new research, new approaches to each aging mechanism, and broader coverage of exercise, sleep, and other non-drug, non-supplement interventions.
Endorsement
"Some of his secrets and insights are breathtakingly simple, yet backed by science. All of the tips are doable by anyone who can read this book. Far too many health books are teases to get you to buy into some expensive program or auto-ship of supplements. Not this book. Everything you need is right here."
— Joe Vitale, author and featured teacher in The Secret; foreword author, Growing Young
About the author
Marc Gitterle, M.D., is a physician specializing in the treatment of complex, non-healing wounds, and hyperbaric medicine, an FDA-registered clinical researcher, speaker and educator living in the Texas Hill Country, near Austin, Texas.
Buy on Amazon — print · Kindle · audiobook.