What Now? with Trevor Noah What Now? with Trevor Noah

Rachel Yehuda: The Biology of What We Carry

Jan 22, 2026

Summary

Trevor Noah interviews Dr. Rachel Yehuda to explore the biological and social complexities of trauma, challenging the simplified view of PTSD. They discuss how trauma affects cortisol levels, the role of community in healing, and the concept of intergenerational trauma, referencing Yehuda’s research on 9/11 survivors. The conversation highlights that trauma is not just psychological but deeply biological, requiring societal support for recovery.

Topics discussed

Introduction: The biology of trauma and fear response Sponsors: Two truths and a lie, Verizon, and Epkinly Defining trauma: PTSD as a disorder vs. normal response Trauma as biology: The body's fear response and memory Intergenerational trauma: Holocaust survivors and their children Community trauma: Bearing the emotional load together The role of cortisol in the stress response Low cortisol in PTSD: Adaptation and recalibration Sponsors: Apple Card, Whole Foods, and Epkinly Modern trauma: Desensitization and commercialized violence Epigenetics: How trauma marks genes in offspring Animal studies: Inherited fear and epigenetic mechanisms Sponsors: Epkinly, Geico, and Zillow Interventions: Hydrocortisone and acute trauma care Psychedelic therapy: MDMA, psilocybin, and healing Conclusion: Empathy, resilience, and the future of trauma care Outro and sponsor: Opportunity at Work
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