Dr. William Li On How To Protect Your Health: What To Eat, What To Avoid & The Daily Habits That Help Fight Disease & Slow Aging
September 28, 2026
AI Summary
5 min readDr. William Li opened the conversation with a claim that sounds alarming until he explains it: cancer is normal. Every day, the body’s 40 trillion cells divide and copy themselves, and the copying process inevitably produces errors. Li calls the body’s repair mechanisms a “spell checker,” but even the best spell checker misses about 10,000 mistakes per day. Those mistakes are microscopic cancers. They sit harmlessly most of the time because the immune system and other defenses keep them in check. The real question is not how to avoid cancer entirely—that is impossible—but how to avoid tipping the odds toward those mistakes growing into disease.
What increases the mistakes—and what doesn’t
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What you'll learn
- 1 Dr. William Li On How To Protect Your Health
- 2 (01:55) **Cancer Is a Normal State of the Body** - Dr. Li explains that we all carry microscopic cancers daily due to normal cell division errors
- 3 (04:18) **What Increases DNA Mistakes** - Oxidative stress from multiple sources raises the risk of more mutations
- 4 (08:06) **The Kiwi Principle: A Simple Start to Better Health** - Dr. Li's go-to first recommendation for improving health
- 5 (13:03) **The Truth About Pesticides and Produce** - Pesticides penetrate deeper than washing can reach, but don't fear fruits
- 6 (19:34) **Dr. Li's Mantra: Love Your Food to Love Your Health** - An inclusive approach beats restrictive diets
- 7 (21:20) **The Common Denominator of Health: Your Blood Vessels** - Healthy circulation is the foundation of all health
+ Full timestamped outline available in the app
Show Notes
#1,010: Join us as we sit down with Dr. William Li – an internationally renowned physician, scientist, and New York Times bestselling Author. His groundbreaking research has led to the development of more than 40 new medical treatments that impact care for more than 70 diseases including diabetes, blindness, heart disease and obesity. In this episode, Dr. William Li breaks down what actually happens inside the body when it comes to aging, disease, and cancer – and how much power we have through the choices we make every day. We dive into the foods that can support your body's natural defenses, the everyday exposures that may be working against you, and the simple habits that can have a major impact on your health. Dr. Li also shares his approach to eating for longevity without fear or restriction, why gut health is so central to overall health, and the surprising role everyday beverages and pantry staples can play in your routine.
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