Today, I'm joined by the legendary Dr. Jeffrey Bland, widely known as the "father of functional medicine" and a true pioneer in the science of longevity and immune resilience. In this conversation, Dr. Jeffrey Bland opens up about his decades-long journey questioning the conventional medicine model, the personal moments that shaped his mission, and how his passion for asking the right questions ultimately led him to reshape the future of healthcare. Visit Bigboldhealth.com/NAT and get 15% off automatically at checkout. Episode Timestamps: Focus on immune system aging... 00:00:00 Questioning conventional medicine and the roots of chronic disease... 00:05:00 Functional medicine and influences like Linus Pauling... 00:12:39 Dangers of oversimplification and the limits of biohacking... 00:17:21 Evolving thinking on supplements and the power of cycling and personalization... 00:19:37 Why immune resilience trumps immune boosting for longevity... 00:25:21 Diet's impact on immune cell turnover and long-term health... 00:28:57 Autoimmunity, CHIP cells, inflammaging, and biological individuality... 00:32:04 Microbiome, mitochondria, and immune-driven fatigue... 01:00:07 The 4R gut and immune program as a starting point... 01:06:26 Movement, lymphatics, and rejuvenation... 01:08:35 Food as information, epigenetics, and practical recommendations... 01:11:25 90-day immune system renewal and rapid-fire takeaways... 01:31:40 Our Amazing Sponsors: Quantum Upgrade - Supports nervous system balance without wearables or apps—just effortless, 24/7 quantum energy streaming. With 21+ studies showing measurable improvements in stress and cellular function, it's easy to try for yourself. Visit quantumupgrade.io/NAT and use code NAT15 to start the free 15 day trial. Primeadine by Oxford Healthspan — A food-derived spermidine supplement that supports autophagy and cellular renewal without fasting, made from Japanese wheat germ with clean, rigorously tested ingredients (including a gluten-free option); visit oxfordhealthspan.com/BIONAT20 and use code BIONAT20 at checkout. PW1 by Puori — A clean, high-quality whey protein that's third-party tested for over 200 contaminants and smooth enough to feel like a treat while supporting muscle, metabolism, and bone strength. Go to puori.com/NAT and use code NAT for 32% off your first subscription or 20% off anything on the site. Nat's Links: YouTube Channel Join My Membership Community Sign up for My Newsletter Instagram Dr. Bill Lawrence Episode