In this 13 July 2026 published video, host Andrew Huberman talks with Dr. Alan Castel, PhD, a professor of psychology at the University of California, Los Angeles (UCLA) and one of the world's foremost experts on human memory and cognitive aging.
Why does protein stop working after 60? It's not a willpower problem—it's anabolic resistance. In this video, we break down the science behind muscle loss and reveal the one food that actually outperforms standard protein sources for rebuilding muscle. Here's what you'll learn: What anabolic resistance actually is and how the leucine threshold changes with age. Why eating more protein isn't the answer, and why eggs and chicken stop producing the same results. The real solution: hemp seeds and how they work through a completely different mechanism—arginine for blood flow, gamma-linolenic acid for inflammation, and slow-digesting protein for sustained muscle synthesis.
