Modern Healthspan

Dr. Dudley Lamming, Associate Professor of Medicine at the University of Wisconsin-Madison, reveals groundbreaking research on dietary protein, branched-chain amino acids (BCAAs), and healthy longevity. Learn how restricting dietary isoleucine extends median lifespan by 33%, why excess protein in sedentary lifestyles drives insulin resistance, and how resistance exercise alters your body's daily protein requirements.

Should you really be eating more protein as you age? While fitness culture encourages high protein intake to prevent muscle loss, biogerontology research shows that excess dietary protein, particularly branched-chain amino acids like isoleucine, accelerates aging biology and insulin resistance in sedentary populations. In this interview, Dr. Dudley Lamming breaks down his landmark findings from over 350 studies and his lab's Cell Metabolism discovery showing that a 67% reduction in isoleucine extends male lifespan by 33% and dramatically slows the onset of physical frailty.

Dr. Lamming explains how muscle tissue acts as a metabolic sink during resistance training, why mice on low-protein diets develop more efficient muscle fibers that match the strength of high-protein groups, and what the latest science says about protein requirements for individuals over age 50.

🌐 Connect with Dr. Dudley Lamming & The Lamming Lab:
• Faculty Profile: https://www.med.wisc.edu
• The Lamming Laboratory: https://lamminglab.medicine.wisc.edu

🔬 Scientific Citations & References Mentioned:
1. Knopf, B.A. & Lamming, D.W. (2026). The hallmarks of protein and amino acid restriction in aging and longevity. Cell Press Blue, 100079. DOI: 10.1016/j.cpblue.2026.100079
2. Green, C.L., Yeh, C.Y., ... Lamming, D.W. (2023). Dietary restriction of isoleucine increases healthspan and longevity of genetically heterogeneous mice. Cell Metabolism, 35(11): 1976-1995. PMID: 37939658
3. Cummings, N.E. et al., & Lamming, D.W. (2018). Decreased consumption of branched-chain amino acids improves metabolic health. Cell Reports, 24(3): 793-805. PMID: 29262313
4. Yu, D., Lamming, D.W. et al. (2021). Restoration of metabolic health by dietary isoleucine restriction requires hepatic FGF21. Cell Metabolism, 33(5): 891-904. PMID: 33951478
5. Lamming, D.W. et al. (2012). Rapamycin-induced insulin resistance is mediated by mTORC2 loss and accompanied by Akt/GSK3beta dysregulation. Science, 335(6076): 1638-1643. PMID: 22461497

⚠️ Medical Disclaimer:
Modern Healthspan content is for educational and informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified physician or healthcare provider before making changes to your health regimen, diet, or lifestyle.

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Dr. Ana Maria Cuervo, Co-Director of the Institute for Aging Research at Albert Einstein College of Medicine, reveals how restoring chaperone-mediated autophagy (CMA) cleanses toxic proteins and preserves cognitive health. Discover why tau is the ideal cellular cleaning substrate until aging modifications clog the system, how restoring CMA clears pathology and protects memory, and how just 20 minutes of gentle exercise activates cellular recycling across tissues.

What if our cells deteriorate with age simply because their precision recycling system fails? In this episode, Dr. Ana Maria Cuervo, pioneer of chaperone-mediated autophagy (CMA), details the molecular machinery that clears damaged proteins before they become toxic aggregates. She reveals how aging lysosomes lose the vital LAMP-2A receptor as membrane lipids stiffen, causing proteins like tau and alpha-synuclein to build up and fuel neurodegeneration.
Dr. Cuervo shares breakthrough findings where small molecules upregulate LAMP-2A, clearing established protein aggregates and restoring memory in Alzheimer's models. She explains the "tau paradox"-why tau is CMA's preferred target, yet modifications like phosphorylation jam the translocation pore. Finally, she offers practical lifestyle protocols, showing how just 20 minutes of gentle exercise three times weekly and strategic meal spacing reactivate cellular cleaning across tissues.

🌐 Connect with Dr. Ana Maria Cuervo & Albert Einstein College of Medicine:
• Faculty Profile: https://einsteinmed.edu/faculty/8784/ana-maria-cuervo/
• Institute for Aging Research: https://einsteinmed.edu/centers/aging/

🔬 Scientific Citations & References Mentioned:
1. Bourdenx, M., et al., & Cuervo, A. M. (2021). Chaperone-mediated autophagy prevents collapse of the neuronal metastable proteome. Cell, 184(10), 2696-2714.
2. Dong, S., et al., & Cuervo, A. M. (2021). Chaperone-mediated autophagy sustains haematopoietic stem-cell function. Nature, 591(7849), 305-309.
3. Khawaja, R. R., et al., & Cuervo, A. M. (2024). Sex-specific and cell-type-specific changes in chaperone-mediated autophagy across tissues during aging. Nature Aging, 4, 1612-1628.
4. Juste, Y. R., et al., & Cuervo, A. M. (2021). Reciprocal regulation of chaperone-mediated autophagy and the circadian clock. Nature Cell Biology, 23(10), 1055-1070.
5. Qiao, L., et al., & Cuervo, A. M. (2022). Protective role of chaperone-mediated autophagy against atherosclerosis. PNAS.
6. Zhang, C., & Cuervo, A. M. (2008). Restoration of chaperone-mediated autophagy in aging liver improves cellular maintenance and organ function. Nature Medicine, 14(9), 959-965.

Dr. Julie Andersen, Professor at the Buck Institute for Research on Aging, reveals how restoring mitochondrial recycling (mitophagy) protects brain cells from neurodegenerative diseases like Parkinson's and Alzheimer's. Discover why damaged mitochondria leak DNA into the cytoplasm to trigger chronic sterile neuroinflammation, how engineered T-regulatory cells cross the blood-brain barrier to clear pathology, and why Urolithin A restores cellular healthspan through a "calm not kill" approach.

Can we stop neurodegenerative diseases before symptoms ever appear? In this episode, Dr. Julie Andersen, leader of the Andersen Laboratory at the Buck Institute for Research on Aging, explains the molecular drivers of brain aging. Dr. Andersen explains how post-mitotic neurons rely entirely on mitophagy to eliminate damaged organelles. When mitochondrial clearance slows with age, damaged mitochondria leak mitochondrial DNA into the cytosol, activating the ancient cGAS-STING immune sensor and sparking chronic neuroinflammation. She shares the findings from her landmark studies showing how environmental stressors impact brain support cells, and why blanket destruction of senescent cells can be counterproductive. Dr. Andersen highlights hopeful translational solutions: from engineered autologous T-regulatory cells that cross the blood-brain barrier to target plaques and produce anti-inflammatories on demand, to a "calm not kill" senomorphic approach using Urolithin A to suppress toxic SASP secretions without harming vital brain cells.

🔬 Scientific Citations & References Mentioned:
1. Chinta, S. J., et al., & Andersen, J. K. (2018). Cellular Senescence Is Induced by the Environmental Neurotoxin Paraquat and Contributes to Neuropathology Linked to Parkinson's Disease. Cell Reports, 22(4), 930-940.
2. Andersen, J. K., et al. Development of Mitophagy-Inducing Small Molecules (MIC) as Therapeutics for Aging and Alzheimer's Disease. Geroscience / Nature Aging.
3. Ballesteros-Alvarez, J., Andersen, J. K., et al. Urolithin A Restores Mitophagy, Reduces Cytosolic mtDNA Leakage, Downregulates cGAS-STING, and Attenuates Paracrine Senescence in Aging CNS Models.
4. Sharma, A., & Andersen, J. K. Urolithin A acts as a senomorphic agent to suppress the senescence-associated secretory phenotype (SASP) without inducing cell death.
🌐 Connect with Dr. Julie Andersen & The Buck Institute:
• Buck Institute Faculty Profile: https://www.buckinstitute.org/lab/andersen-lab/
• Buck Institute for Research on Aging: https://www.buckinstitute.org

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Dr. Martin Picard, head of the Mitochondrial Psychobiology Laboratory at Columbia University, explains how cellular energy constraints and emotional stress drive biological aging. Discover how psychological allostatic load burns up to 60% more cellular energy, why hair graying is naturally reversible upon recovery, and how providing periods of physiological rest allows your mitochondria to restore cellular healthspan.

Can psychological stress and mindset directly change the biology of your mitochondria? In this episode, Dr. Martin Picard, Associate Professor of Behavioral Medicine at Columbia University Irving Medical Center, breaks down his pioneering field of mitochondrial psychobiology. Dr. Picard reveals how acute and chronic mental stressors signal directly to glucocorticoid receptors inside mitochondria, driving damaged cells into a costly state of hypermetabolism where they burn 60% more energy simply to stay alive. This metabolic burden steals vital energy away from core anti-aging maintenance, including DNA repair, telomere integrity, and cellular cleanup. He shares the science behind his landmark study demonstrating that human hair graying is naturally reversible when psychological stress is relieved, proving that biological aging is not a rigid linear decline but a malleable process with substantial wiggle room. Dr. Picard also explores why damaged mitochondria undergo herniation and leak cell-free mitochondrial DNA (cf-mtDNA) into the cytoplasm and bloodstream, triggering innate immune alarms and sterile inflammation. Finally, we discuss actionable strategies to measure and protect your bioenergetic health, from VO2 max and cellular stress biomarkers like GDF-15 to the restorative power of meditation and physiological rest.

🔬 Scientific Citations & References Mentioned: 1. Rosenberg, A. M., et al. (2021). Quantitative mapping of human hair graying and reversal in relation to life stress. eLife, 10, e67437.
2. Picard, M., & McEwen, B. S. (2018). Psychological Stress and Mitochondria: A Systematic Review. Psychosomatic Medicine, 80(2), 141-153.
3. Picard, M., Juster, R. P., & McEwen, B. S. (2014). Mitochondrial allostatic load puts the 'gluc' back in glucocorticoids. Nature Reviews Endocrinology, 10(5), 303-310.
4. Sturm, G., et al., & Picard, M. (2023). Overactive cell metabolism linked to biological aging / Hypermetabolism in human cellular aging. Communications Biology.

🌐 Connect with Dr. Martin Picard:
• Website: https://martinpicard.energy
• Substack (The Science and Experience of Energy): https://martinpicard.substack.com
• Substack profile - substack.com/@martinpicard
• LinkedIn - linkedin.com/in/mitopsychobio
• X - x.com/MitoPsychoBio
• Instagram - instagram.com/martinpicard.energy/

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Renue by Science all 10% discount with code MHS https://renuebyscience.com/
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Join Dr. John Sedivy, Director of the Center on the Biology of Aging at Brown University, as he explains how ancient jumping genes (LINE-1 retrotransposons) awaken as our epigenome decays, driving chronic sterile inflammation and cellular aging. Discover how reverse transcriptase inhibitors and epigenetic maintenance can slow biological aging clocks and protect tissue healthspan.

What if ancient viral elements embedded in our DNA wake up as we age to drive chronic systemic inflammation? In this episode, Dr. John Sedivy breaks down his groundbreaking discovery of LINE-1 retrotransposons ("jumping genes"). Dr. Sedivy explains how age-related heterochromatin decay allows dormant LINE-1 elements to replicate, generating cytoplasmic cDNA that triggers the cGAS-STING innate immune pathway and fuels the pro-inflammatory SASP in senescent cells. He discusses how repurposing generic reverse transcriptase inhibitors like Lamivudine can halt this cascade, lower systemic inflammatory markers, and profoundly decelerate Horvath DNA methylation aging clocks. Learn about ongoing clinical trials in Alzheimer's disease, government-backed ARPA-H longevity programs, and how preserving epigenetic integrity can combat inflammaging.

🔬 Scientific Citations & References Mentioned: 1. De Cecco, M., et al. (2019). L1 drives IFN in senescent cells and promotes age-associated inflammation. Nature, 566(7742), 73-78. 2. Kelsey, K., Sedivy, J. M., et al. (2025/2026). Retrotransposon Activation in the Aged and Alzheimer's Disease Brain Examined by Nanopore Long-read DNA Sequencing. 3. Simon, M., et al. (2019). LINE1 derepression in aged and senescent tissues promotes inflammation and can be targeted by reverse transcriptase inhibitors. Cell Metabolism / Nature Aging.

🌐 Links in this video: - Center on the Biology of Aging at Brown University: https://biologyofaging.brown.edu - bioRxiv Preprints: https://www.biorxiv.org

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If you would like to support our channel please consider signing up on patreon https://patreon.com/ModernHealthspan
You can also find us on YouTube at https://www.youtube.com/c/modernhealthspan