Dr. Brendan McCarthy

Trauma Is Driving Your Diet (Not Willpower) | Ultra-Processed Foods Explained

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Why do so many people know what to eat… but still can’t follow through?

In this episode, Dr. Brendan McCarthy breaks down the powerful connection between trauma, stress, and ultra-processed foods—and why willpower alone is not enough.

You’ll learn how the nervous system, PTSD, and chronic stress can rewire your relationship with food, driving cravings and behaviors that feel out of your control.

This isn’t about discipline. It’s about understanding the biology behind your choices.

Inside this episode:

  • How trauma changes the way you make decisions
  • Why ultra-processed foods create temporary emotional relief
  • The brain chemistry behind cravings (dopamine, serotonin, endocannabinoids & more)
  • Why “just stop eating it” doesn’t work
  • How to create real change without shame or restriction

    • If you’ve ever felt stuck in a cycle with food, this episode will change how you see it—and give you a path forward.

    📍 Protea Medical Center | Tempe, Arizona

    👍 If this helped you, like, subscribe, and share with someone who needs to hear this.

    📚 Citations & Research

    PTSD & Complex PTSD

    • Substance Abuse and Mental Health Services Administration (2014). DSM-5 Criteria for PTSD.
      • https://www.ncbi.nlm.nih.gov/books/NBK207191/box/part1_ch3.box16/
    • Larsen, S. E. (VA National Center for PTSD). Complex PTSD Overview
      • https://www.ptsd.va.gov/professional/treat/essentials/complex_ptsd.asp

      Women, Trauma & PTSD

      • Vogt, D., & Mangan, E. Research on Women, Trauma, and PTSD
        • https://www.ptsd.va.gov/professional/treat/specific/ptsd_research_women.asp
      • Dworkin, E. R. et al. (2017). Sexual Assault & Psychopathology Meta-Analysis
        • https://pmc.ncbi.nlm.nih.gov/articles/PMC5576571/
      • Dworkin, E. R. (2020). Risk for Mental Disorders After Sexual Assault

        • PTSD & Addictive-Like Eating

        • Mason, S. M. et al. (2014). PTSD Symptoms & Food Addiction (JAMA Psychiatry)
          • https://jamanetwork.com/journals/jamapsychiatry/fullarticle/1904804
        • Brewerton, T. D. (2021). Food Addiction, Trauma & Comorbidity
        • Brewerton, T. D. (2017). Trauma & Eating Disorders
          • https://link.springer.com/article/10.1007/s11920-017-0806-6
        • Gearhardt, A. N. et al. (2016). Yale Food Addiction Scale 2.0

          • Stress & Food Choice

          • Maier, S. U. et al. (2015). Stress Impairs Self-Control in Food Choice
            • https://www.sciencedirect.com/science/article/pii/S0896627315006273
          • Yau, Y. H. C., & Potenza, M. N. (2013). Stress & Eating Behaviors
            • https://pmc.ncbi.nlm.nih.gov/articles/PMC4214609/

            Relief Mechanisms (Biological Pathways)

            • Adam, T. C., & Epel, E. S. (2007). Stress, Eating & Reward System
              • https://www.sciencedirect.com/science/article/abs/pii/S0031938407001278
            • DiPatrizio, N. V. (2021). Endocannabinoids & Food Intake
              • https://pmc.ncbi.nlm.nih.gov/articles/PMC8067588/
            • Fernstrom, J. D., & Wurtman, R. J. (1972). Serotonin Regulation
              • https://pubmed.ncbi.nlm.nih.gov/5077329/
            • Penckofer, S. et al. (2012). Glycemic Variability & Mood
              • https://pubmed.ncbi.nlm.nih.gov/22324383/

              Oral Self-Regulation

              • Franco, P. et al. (2004). Pacifier Use & Autonomic Control
              • Pinilla, T., & Birch, L. J. (1993). Infant Sleep & Oral Soothing

                • Dopamine & Craving

                • Berridge, K. C., & Robinson, T. E. (2016). Incentive-Sensitization Theory
                  • https://pmc.ncbi.nlm.nih.gov/articles/PMC5171207/
                • Boswell, R. G., & Kober, H. (2016). Food Cue Reactivity
                  • https://pubmed.ncbi.nlm.nih.gov/26644270/

                  Ultra-Processed Foods

                  • Monteiro, C. A. et al. (2018). NOVA Classification
                    • https://pmc.ncbi.nlm.nih.gov/articles/PMC10261019/
                  • Hall, K. D. et al. (2019). Ultra-Processed Diet RCT
                    • https://www.sciencedirect.com/science/article/pii/S1550413119302487
                  • Gearhardt, A. N., & DiFeliceantonio, A. G. (2023). Addictive Potential

                    • Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more.

                    If you’re ready to take your health seriously, this podcast is a great place to start.

                    👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it.

                    📘 Read Dr. McCarthy’s Book:

                    Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones
                    https://www.amazon.com/Jump-Off-Mood-...

                    📲 Follow Dr. McCarthy:

                    Instagram: @drbrendanmccarthy
                    TikTok: @drbrendanmccarthy
                    Website: www.protealife.com

                    💬 Got a question or topic for a future episode? Let us know in the comments! 

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