The High Protein Panic: Why You Don't Need to Fear Your Diet

Is the recent panic over a high protein diet actually supported by science? I clarify what the data says about heart and metabolic health. There's a clip going around right now claiming new research links high protein diets to more heart disease and more diabetes. I went and found the actual studies, because if it's real, it changes how I'd advise people. It is real, and it's also being used to tell a bigger story than the data actually supports. In this video I walk through what these studies actually found, and what it means for how much protein you should really be eating. Welcome to Dr. Joanette MD Hi, I'm Dr. Joanette, an ER doctor, Blue Zone native, and founder of Optimum Health MD. I blend decades of emergency medicine experience with modern longevity science to bring you practical, evidence-based insights that help you live stronger, longer. Everyone is welcome here. Dr. Joanette's Bio I'm the founder of Optimum Health MD, dedicated to optimizing health and longevity. I graduated from New York Medical College in 1995 and am board-certified in Emergency Medicine. I'm licensed to practice in the states of California and New York. This channel is separate from my duties as attending medical staff at Saint John's Riverside Hospital and as an assistant professor at Albert Einstein College of Medicine and Lake Erie College of Medicine. The views expressed on this channel are my own. TIMESTAMPS: 0:00 – The viral claim: does high protein cause heart disease and diabetes? 0:27 – Dr. Joanette's background, and why this deserves a careful look 0:49 – The heart disease mechanism: leucine, mTOR, and artery plaque 1:51 – The cohort study: why the cardiovascular signal only shows up after 55 2:21 – The diabetes research: how BCAA byproducts interfere with insulin release 3:12 – Why this isn't "protein causes diabetes" 3:48 – What this actually means for how much protein you should eat 4:57 – Get a personalized protein target with Optimum Health MD STUDIES REFERENCED: 1. Zhang X, Kapoor D, Jeong SJ, et al. "Identification of a Leucine-Mediated Threshold Effect Governing Macrophage mTOR Signalling and Cardiovascular Risk." Nature Metabolism. 2024;6:359–377. https://doi.org/10.1038/s42255-024-00984-2 2. Huang C, Yu Y, Liang W, et al. "Associations Between High Protein Intake and Cardiovascular Diseases by Age Groups: A Cohort Study." The Journal of Nutrition, Health and Aging. 2026. https://www.sciencedirect.com/science/article/pii/S1279770725002520 3. Lin H, Ho MYM, Wang B, et al. "Branched-Chain α-Keto Acids Impair Glucose-Stimulated Insulin Secretion in Pancreatic β-Cells Under Diabetes by Reactivating the LDHA-Lactate Axis." Nature Communications. 2026. https://doi.org/10.1038/s41467-026-70004-2 4. Zhou GHY, et al. "Causal Role of Genetically Predicted Impairment of Branched-Chain Amino Acid Catabolism on Insulin Secretion and Insulin Resistance in Type 2 Diabetes." Diabetes, Obesity and Metabolism. 2026;28(5):3849–3860. https://doi.org/10.1111/dom.70565 📌 If you want a protein target that actually accounts for your age, your metabolic health, and your activity level, that's exactly the kind of individualized work we do at Optimum Health MD. DISCLAIMER: As a physician passionate about health education, I want to be clear that while I share evidence-based information, I am not your personal doctor and don't know your unique medical history. The recipes and wellness tips I provide are for educational purposes only. Before making any dietary or lifestyle changes based on my content, please consult with your healthcare provider, who understands your specific health needs and can offer personalized guidance. Your well-being matters, and I'm here to support your health journey alongside the care you receive from your medical team. Thanks for joining me today, and I'll see you in the next one. #HighProteinDiet #ProteinIntake #HeartHealth #Diabetes #Longevity #ERDoctor #OptimumHealthMD #NutritionScience #MuscleHealth #MetabolicHealth Don’t forget to subscribe for more health tips and recipes! @DrJoanette Website: https://optimumhealthmd.com/ Follow for More! TikTok: https://www.tiktok.com/@drjoanette LinkedIn: https://www.linkedin.com/in/drjoanetteweissemd