E204 – Dr. William Li: The Body's 5 Health Defense Systems, Cancer, Microplastics & Healing From the Inside Out

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Dr. William Li is a Harvard-trained physician, co-founder of the Angiogenesis Foundation, and New York Times bestselling author whose work centers on one quietly radical premise: the power to stay healthy lives inside you. In this conversation, we explore the five hardwired defense systems the body runs continuously, angiogenesis, stem cells, the gut microbiome, immunity, and DNA protection, and what it looks like to actually support them through food, sleep, and daily choices.What We Dive Into:1. You are not just one organism. You carry 39 trillion bacteria inside you, many of which send signals up through the vagus nerve directly to the brain, shaping mood, social behavior, and stress levels.2. Your body was born with 70 million extra stem cells stored in bone marrow, ready to mobilize and repair damage whenever called. Sleep, food, and metabolic health directly influence how effectively they do their job.3. The environment is full of things we cannot fully control, microplastics, toxins, pollution. What we can control is whether our internal defense systems are strong enough to handle the load. Chronic stress degrades those systems faster than most environmental exposures.Know Thyself, but not by yourself. A guided space to return home to yourself.https://www.knowthyselfcollective.com✨THANK YOU TO OUR SPONSORS:https://drinkLMNT.com/KnowThyselfTry LMNT & get a free sample pack https://oneskin.co/KNOWTHYSELFCode KNOWTHYSELF for 15% off___________00:00 Intro01:42 Health Is Not the Absence of Disease05:24 The Five Health Defense Systems07:14 Defense 1: Angiogenesis and Blood Vessel Health09:07 Defense 2: Stem Cells and the Body's Repair System14:01 Defense 3: The Gut Microbiome and the Holobiont21:38 Defense 4: The Immune System as Inner Army31:44 Defense 5: DNA Repair and the Iron Dome Within36:48 Cancer Is Growing in All of Us Right Now43:07 The Rising Cancer Rates and Why They're Skewing Younger47:40 Microplastics: Where They Come From and Why They Matter55:37 The Case for Keeping Your Shields Up59:15 Practical