Leucine is often celebrated as one of the most important nutrients for healthy aging. As a key amino acid involved in muscle protein synthesis, leucine helps preserve strength, mobility, and independence — all critical factors for aging well.
But emerging longevity research suggests the story may be more complicated.
In this episode of The Aging Well Podcast, Dr. Jeff Armstrong and cohost Corbin Bruton explore the “double-edged sword” of leucine. While leucine supports muscle maintenance and mitochondrial energy production, it also strongly activates the mTOR pathway — a biological growth signal associated with accelerated aging and reduced lifespan in some animal studies when chronically overstimulated.
So how do we reconcile these competing ideas? Is leucine helping us age better, or merely helping us age stronger? And is there a difference?
Together, they unpack the complex relationship between muscle, metabolism, longevity science, mitochondrial function, exercise, and nutritional balance — exploring what it means to pursue not just longer life, but wiser aging.
Article Referenced:
University of Cologne. "Scientists discover the nutrient that can supercharge cellular energy." ScienceDaily. ScienceDaily, 21 May 2026. www.sciencedaily.com/releases/2026/05/260520233221.htm
Please, support The Aging Well Podcast by hitting the ‘like’ button, subscribing/following the podcast, sharing with a friend, and….
Tip Jar! All donations support this podcast to keep it going. https://paypal.me/theagingwellpodcast
BUY the products you need to… age well from our trusted affiliates and support the mission of The Aging Well Podcast*.
The Aging Well Podcast merchandise | Show how you are aging well | Use the promo code AGING WELL for free shipping on orders over $75 | https://theagingwellpodcast-shop.fourthwall.com/promo/AGINGWELL
Auro Wellness | Glutaryl—Antioxidant spray that delivers high doses of glutathione (“Master Antioxidant”) and the new Copper Tripeptide (GHK-Cu) | 10% off Code: AGINGWELL at https://aurowellness.com/agingwellpodcast
Nutritional Biochemical Inc. (NBI) | Trusted supplement. NBI stands 100% behind the quality of their formulations and the science on which they’re based. | Click the following link and use the discount code AGINGWELL for 10% off: https://shop.nbihealth.com/agingwell
Jigsaw Health | Trusted supplements. “It’s fun to feel good.” | Click the following link and use the discount code AGINGWELL for 10% off: https://bit.ly/4ks3Y0O
Berkeley Life | Optimize nitric oxide levels | Purchase your starter kit at a 15% discount | Use the promo code: AGINGWELL15 | https://berkeleylife.pxf.io/c/6475525/3226696/31118
Oxford Healthspan | Primeadine®, a plant-derived spermidine supplement | 10% off code: AGINGWELL | https://www.oxfordhealthspan.com/AGINGWELL
KneeMo | A smart device programmed to reduce your knee pain and keep you moving. | Click the following link and use the discount code AGINGWELL15 for 15% off: https://thekneemo.com/ref/agingwell
Prolon | The Fasting Mimicking Diet (FMD) is a revolutionary five-day nutrition program scientifically formulated to mimic the effects of a prolonged water fast while still allowing nourishment - supporting the benefits of fasting without the challenges and risks that come from water-only fasts. | For the best available discount always use this link: https://prolonlife.com/theagingwellpodcast
Thrive25 | Your personal longevity advisor | https://www.thrive25.com/early-access?via=william-jeffrey
Fusionary Formulas | Combining Ayurvedic wisdom with Western science for optimal health support. | 15% off Code: AGINGWELL | https://fusionaryformulas.com?sca_ref=9678325.IHg5xYhdOzzke8Zr
*We receive commission on these purchases. Thank you.
