In this energizing and information-packed episode, world-renowned physician, author, and public health advocate Dr. Michael Greger joins Greg Hanna to talk about cutting-edge nutrition science, longevity research, and his latest book, How Not to Age.

From surprising findings on red wine and NAD supplements to the powerful role of purple sweet potatoes and time-restricted eating, Dr. Greger breaks down the most up-to-date studies in clear, actionable language. He also shares behind-the-scenes insights from writing the book, the truth about olive oil and krill oil, and why being of service is the real path to happiness.

• Surprising Longevity Discoveries
  Dr. Greger reveals unexpected findings from his newest book, including new science on resveratrol, vitamin D, NAD, fish, protein restriction, microRNAs, and more.

• How Long Could We Really Live?
  Greg asks about extending human lifespan. Dr. Greger discusses the potential of living to 150+ and what animals like the “immortal jellyfish” and naked mole rats teach us about biological aging.

• The Basics Still Matter Most
  While science explores futuristic aging interventions, Greger emphasizes the foundational importance of not smoking, regular exercise, maintaining a healthy weight, and eating more whole plant foods.

• The Truth About Olive Oil and Krill Oil
  Dr. Greger explains why extra virgin olive oil is better than refined oils and why marketing hype often overshadows real, unbiased science when it comes to supplements.

• Do You Practice What You Preach?
  Yes—but travel makes it harder! Dr. Greger shares his go-to airplane snack (microwaved purple sweet potatoes!) and what he eats on the road versus at home.

• Why Purple Sweet Potatoes Rock
  These anthocyanin-rich tubers are linked to Okinawan longevity and are one of Dr. Greger’s top picks for daily fuel.

• Intermittent Fasting Done Right
  The best kind? Early Time-Restricted Feeding. Skipping dinner (not breakfast) and aligning meals with circadian rhythms can dramatically improve metabolism and weight loss.

• The Truth About Long-Term Water Fasting
  It may offer health benefits—but only under clinical supervision. Dr. Greger explains the real risks, including electrolyte imbalances and seizures if not carefully monitored.

• The Bigger Picture: Service and Legacy
  In a heartfelt final message, Dr. Greger shares the most important lesson of his life—why dedicating your life to helping others is the true source of happiness and fulfillment.

“The most important thing I've ever learned? Service. The happiest moments of my life come from making a difference in someone else’s.”
— Dr. Michael Greger

“You don’t want to die the day before the breakthrough. Live long enough to live forever.”
— Dr. Michael Greger

“Skip dinner, not breakfast. Early Time-Restricted Feeding is where the magic is.”
— Dr. Michael Greger

“Purple sweet potatoes—microwave one before your flight. Perfect snack. Great anthocyanins. And it's a hand warmer.”
— Dr. Michael Greger

“I donate all proceeds from my books to charity. I just want people to live the longest, healthiest lives possible.”
— Dr. Michael Greger

How Not to Age

• Author: Dr. Michael Greger, MD

• Publisher: Flatiron Books

• Available: Amazon, Barnes & Noble, Bookshop.org

• Overview: A science-packed guide to slowing and reversing aging, covering everything from inflammation and cellular senescence to movement, brain health, and micronutrient hacks.

• 🔬 Visit Dr. Greger’s free research archive: NutritionFacts.org

• 📘 Get his books: How Not to Die, How Not to Diet, How Not to Age

• 🧪 Explore the Daily Dozen checklist: nutritionfacts.org/daily-dozen

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