EXPLAINER: 3 Blood Tests Your Doctor Skips (That Predict Heart Attacks & Alzheimer's)

Your doctor orders a lipid panel every year — but 3 cheap blood tests predict heart disease, diabetes, and even dementia far better than cholesterol, and most doctors never order them.In this episode, Robert Lufkin MD walks through fasting insulin + HOMA-IR, homocysteine, and high-sensitivity CRP — three tests that together cost about $60, take one blood draw, and catch the metabolic dysfunction a standard lipid panel systematically misses.CHAPTERS:00:00 — The 3 Blood Tests Your Doctor Isn't Ordering00:40 — Part 1: Fasting Insulin and HOMA-IR01:15 — How Insulin Resistance Hides for 10–15 Years01:45 — HOMA-IR vs Glucose: What 516,000 People Revealed02:05 — 59% Higher Cardiovascular Risk in the 2023 ATVB Study02:45 — Optimal Fasting Insulin: Why 5–8 Beats the Lab's "25"03:05 — Part 2: Homocysteine and the MTHFR Connection03:35 — How Homocysteine Damages Your Arteries (6 Mechanisms)03:50 — 60% Higher Stroke Risk and 48% Alzheimer's Risk04:35 — The Oxford VITACOG Trial: 53% Less Brain Atrophy05:05 — Part 3: High-Sensitivity CRP and Inflammatory Plaque05:40 — The JUPITER Trial: 44% Drop in Cardiac Events06:15 — UK Biobank: Why hs-CRP Beats LDL Cholesterol06:50 — AHA Risk Categories for hs-CRP Since 200307:15 — Part 4: The Metabolic Picture (Why Cholesterol Is the Wrong Target)07:50 — 3 Tests, $60, One Blood Draw — The Full FrameworkKEY TAKEAWAYS:Fasting insulin + HOMA-IR catches insulin resistance a decade before glucose goes abnormal — optimal is below 5–8, not the lab's reference range of 25Every 5 µmol/L rise in homocysteine raises coronary artery disease risk 20–30% and stroke risk 60%, independent of cholesterolhs-CRP predicted cardiovascular events better than LDL in a 322,000-person UK Biobank analysis — yet fewer than 10% of cardiac panels order itCardiovascular disease, type 2 diabetes, and dementia share the same upstream driver: metabolic dysfunction, not cholesterolAll three tests together cost roughly $60 and come from a single blood drawLINKS: 📖 Dr. Lufkin's book "Lies I Taught in Medical School": robertlufkinmd.com/lies 📰 Substack: robertlufkinmd.substack.com 🌐 Website: robertlufkinmd.com ▶️ Watch on YouTube: youtu.be/FBLB1CQGBPM⭐ Enjoying the show? Please leave a 5-star review on Apple Podcasts — it takes 30 seconds and helps more people discover the science of health and longevity. Thank you!New episodes every other Tuesday. Subscribe so you don't miss one.Continue this conversation on Substack: https://robertlufkinmd.substack.comLies I Taught In Medical School — Free sample chapter: https://www.robertlufkinmd.com/lies/Web: https://www.robertlufkinmd.comYouTube: https://www.youtube.com/robertlufkinmdX: https://x.com/robertlufkinmdInstagram: https://www.instagram.com/robertlufkinmd/TikTok: https://www.tiktok.com/@robertlufkinLinkedIn: https://www.linkedin.com/in/robertlufkinmd/