Dr. Brendan McCarthy

The Shame Trap of Ultra-Processed Foods

In this episode, Dr. Brendan McCarthy dives deep into the psychology of ultra-processed foods, compulsive eating, shame, and why so many people feel trapped in unhealthy food cycles.
This conversation goes far beyond calories and willpower.
Dr. McCarthy explains how ultra-processed and hyper-palatable foods are intentionally engineered to drive repeat consumption, how emotional memories and stress shape cravings, and why shame-based nutrition advice often makes the problem worse instead of better.
Topics covered in this episode include:
• How ultra-processed foods affect the brain• Why compulsive eating is learned — and can be unlearned• The connection between trauma, stress, and food cravings• The difference between guilt and shame• How marketing and emotional associations shape eating habits• Why “clean eating” language can be harmful• The neuroscience of cravings, dopamine, serotonin, and reward• What real freedom with food actually looks like• Why self-compassion matters in healing
If you’ve ever felt trapped in cycles of emotional eating, binge eating, food guilt, or shame around nutrition, this episode is for you.
 
📚 Research & References
Tangney, June Price, Jeff Stuewig, and Debra J. Mashek. “Moral Emotions and Moral Behavior.” Annual Review of Psychology, vol. 58, 2007, pp. 345–372.
Nechita, Dan M., et al. “Shame and Eating Disorders Symptoms: A Meta-Analysis.” International Journal of Eating Disorders, vol. 54, no. 11, 2021, pp. 1899–1945.
Tomiyama, A. Janet. “Weight Stigma Is Stressful. A Review of Evidence for the Cyclic Obesity/Weight-Based Stigma Model.” Appetite, vol. 82, 2014, pp. 8–15.
Levinson, Julia A., et al. “A Systematic Review of Weight Stigma and Disordered Eating Cognitions and Behaviors.” Obesity Reviews, 2024.
Kelly, Allison C., et al. “Self-Compassion and Shame in Eating Disorder Recovery.” International Journal of Eating Disorders, vol. 47, no. 5, 2014, pp. 512–515.
Boswell, Rebecca G., and Hedy Kober. “Food Cue Reactivity and Craving Predict Eating and Weight Gain: A Meta-Analytic Review.” Obesity Reviews, vol. 17, no. 2, 2016, pp. 159–177.
Schultz, Wolfram. “Dopamine Reward Prediction Error Coding.” Dialogues in Clinical Neuroscience, vol. 18, no. 1, 2016, pp. 23–32.
Berridge, Kent C., and Terry E. Robinson. “Liking, Wanting, and the Incentive-Sensitization Theory of Addiction.” American Psychologist, vol. 71, no. 8, 2016, pp. 670–679.
Morales, Irene, and Kent C. Berridge. “‘Liking’ and ‘Wanting’ in Eating and Food Reward: Brain Mechanisms and Clinical Implications.” Physiology & Behavior, vol. 227, 2020, article 113152.
Hall, Kevin D., et al. “Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake.” Cell Metabolism, vol. 30, no. 1, 2019, pp. 67–77.e3.
Gearhardt, Ashley N., et al. “Social, Clinical, and Policy Implications of Ultra-Processed Food Addiction.” BMJ, vol. 383, 2023, p. e075354.
Haedt-Matt, Alissa A., and Pamela K. Keel. “Revisiting the Affect Regulation Model of Binge Eating: A Meta-Analysis of Studies Using Ecological Momentary Assessment.” Psychological Bulletin, vol. 137, no. 4, 2011, pp. 660–681.
Wagner, Heather S., Traci Mann, and Janet Tomiyama. “The Myth of Comfort Food.” Health Psychology, vol. 33, no. 12, 2014, pp. 1552–1557.
Schaefer, Lauren M., et al. “Examining the Role of Craving in Affect Regulation Models of Binge Eating.” International Journal of Eating Disorders, 2023.
Jansen, Anita, et al. “A Learning Model of Binge Eating: Cue Reactivity and Cue Exposure.” Behaviour Research and Therapy, vol. 88, 2016, pp. 75–84.
Craske, Michelle G., et al. “Maximizing Exposure Therapy: An Inhibitory Learning Approach.” Behaviour Research and Therapy, vol. 58, 2014, pp. 10–23.
Grilo, Carlos M. “Psychological and Behavioral Treatments for Binge-Eating Disorder.” Journal of Clinical Psychiatry, vol. 78, suppl. 1, 2017, pp. 20–24.
 
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 Hormoneshttps://www.amazon.com/Jump-Off-Mood-...
📲 Follow Dr. McCarthy:Instagram: @drbrendanmccarthyTikTok: @drbrendanmccarthyWebsite: www.protealife.com
💬 Got a question or topic for a future episode? Let us know in the comments! 

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

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 Overviewhttps://www.ptsd.va.gov/professional/treat/essentials/complex_ptsd.asp
Women, Trauma & PTSD
Vogt, D., & Mangan, E. Research on Women, Trauma, and PTSDhttps://www.ptsd.va.gov/professional/treat/specific/ptsd_research_women.asp
Dworkin, E. R. et al. (2017). Sexual Assault & Psychopathology Meta-Analysishttps://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 Disordershttps://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 Choicehttps://www.sciencedirect.com/science/article/pii/S0896627315006273
Yau, Y. H. C., & Potenza, M. N. (2013). Stress & Eating Behaviorshttps://pmc.ncbi.nlm.nih.gov/articles/PMC4214609/
Relief Mechanisms (Biological Pathways)
Adam, T. C., & Epel, E. S. (2007). Stress, Eating & Reward Systemhttps://www.sciencedirect.com/science/article/abs/pii/S0031938407001278
DiPatrizio, N. V. (2021). Endocannabinoids & Food Intakehttps://pmc.ncbi.nlm.nih.gov/articles/PMC8067588/
Fernstrom, J. D., & Wurtman, R. J. (1972). Serotonin Regulationhttps://pubmed.ncbi.nlm.nih.gov/5077329/
Penckofer, S. et al. (2012). Glycemic Variability & Moodhttps://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 Theoryhttps://pmc.ncbi.nlm.nih.gov/articles/PMC5171207/
Boswell, R. G., & Kober, H. (2016). Food Cue Reactivityhttps://pubmed.ncbi.nlm.nih.gov/26644270/
Ultra-Processed Foods
Monteiro, C. A. et al. (2018). NOVA Classificationhttps://pmc.ncbi.nlm.nih.gov/articles/PMC10261019/
Hall, K. D. et al. (2019). Ultra-Processed Diet RCThttps://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 Hormoneshttps://www.amazon.com/Jump-Off-Mood-...
📲 Follow Dr. McCarthy:Instagram: @drbrendanmccarthyTikTok: @drbrendanmccarthyWebsite: www.protealife.com
💬 Got a question or topic for a future episode? Let us know in the comments! 

Women, Hormones & Cholesterol: The Hidden Role of Ultra-Processed Foods

Today, we’re diving into a topic that should be getting far more attention:
Cardiovascular disease in women.
Heart disease is one of the leading causes of death in women—yet it’s often under-addressed, oversimplified, and misunderstood in clinical practice.
Most women are told:“Eat better. Take this prescription.”
But that approach misses something critical.
Full citation list:    •    Hall, Kevin D., et al. “Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake.” Cell Metabolism, vol. 30, no. 1, 2019, pp. 67–77.e3. Supports the core causal point that ultra-processed foods drive higher intake and weight gain even under controlled feeding conditions; this is not a women-specific lipid paper, but it is the cleanest experimental anchor for why UPFs create a high-throughput metabolic environment.    •    El Khoudary, Samar R., et al. “Menopause Transition and Cardiovascular Disease Risk: Implications for Timing of Early Prevention: A Scientific Statement From the American Heart Association.” Circulation, vol. 142, no. 25, 2020, pp. e506–e532. Supports the midlife women’s frame: across the menopause transition, LDL-C and ApoB rise, metabolic risk shifts, and cardiovascular prevention needs to become more deliberate during this window. This supports the “why I care about lipids in endocrine care” part of the episode.    •    Derby, Carol A., et al. “Lipid Changes During the Menopause Transition in Relation to Age and Weight: The Study of Women’s Health Across the Nation.” American Journal of Epidemiology, vol. 169, no. 11, 2009, pp. 1352–61. Foundational SWAN paper establishing that the menopause transition itself — not just chronological aging — is associated with adverse lipid shifts in midlife women. This is the original observation that the timing argument rests on.    •    Wu, Bingjie, et al. “Trajectories of Blood Lipids Profile in Midlife Women: Does Menopause Matter?” Journal of the American Heart Association, vol. 12, no. 22, 2023, e030388. Supports the claim that LDL-C, total cholesterol, and ApoB follow distinct trajectory patterns through the menopause transition, with subgroups of women showing rising lipids in the years before the final menstrual period — useful for the timing argument that body and symptom changes can precede the obvious lab story.    •    Matthews, Karen A., et al. “Age at Menopause in Relationship to Lipid Changes and Subclinical Carotid Disease Across 20 Years: Study of Women’s Health Across the Nation.” Journal of the American Heart Association, vol. 10, no. 18, 2021, e021362. Supports the point that ApoB and Apo A1 changes cluster around the final menstrual period and that adverse lipid shifts in the early postmenopausal years track with subclinical carotid disease later — connects menopausal timing to the longer cardiovascular arc rather than a one-time lab blip.    •    De Oliveira-Gomes, Diana, et al. “Apolipoprotein B: Bridging the Gap Between Evidence and Clinical Practice.” Circulation, vol. 150, no. 1, 2024, pp. 62–79. Supports the practical ApoB explanation: ApoB reflects atherogenic particle burden and outperforms LDL-C for ASCVD risk prediction in many settings, but adoption lags because clear apoB targets and triggers are still lacking in mainstream guidelines. Good support for the public-service “what the hell is ApoB anyway?” section.    •    Williamson, Laura. “The Slowly Evolving Truth About Heart Disease and Women.” American Heart Association News, 9 Feb. 2024, heart.org/en/news/2024/02/09/the-slowly-evolving-truth-about-heart-disease-and-women. Supports the broader clinical framing that women remain underrecognized or undertreated in cardiovascular care and that women’s heart disease still needs better public and clinical communication. This is more public-facing than mechanistic, but useful for your opening frame.
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 Hormoneshttps://www.amazon.com/Jump-Off-Mood-...
📲 Follow Dr. McCarthy:Instagram: @drbrendanmccarthyTikTok: @drbrendanmccarthyWebsite: www.protealife.com
💬 Got a question or topic for a future episode? Let us know in the comments! 

Ultra-Processed Foods & Autoimmunity

Today, we’re diving into autoimmunity—what it actually is, why it happens, and how ultra-processed foods may be contributing to the problem.
Autoimmune disease is often misunderstood. Some will tell you diet has nothing to do with it. Others claim diet is the cure. The truth is more nuanced—and that’s exactly what we explore in this episode.
You’ll learn:
What autoimmunity really is (and why it’s a case of mistaken identity)
How inflammation and the immune system interact
The critical role of gut health and the microbiome
How ultra-processed foods disrupt intestinal integrity and immune signaling
Why stress and hyper-palatable foods create a harmful cycle
A practical experiment you can try to see how diet impacts your own biomarkers
This isn’t about selling supplements or pushing extremes. It’s about understanding the science so you can make informed decisions about your health.
As always, this episode is backed by scientific literature. Full citations are included below, with abbreviated versions available on shorter clips.
If you’re dealing with autoimmune symptoms—or just want to better understand how food impacts your immune system—this episode is for you.
 
Full citation list:
Hall KD, et al. “Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake.” Cell Metabolism, 2019.
    Supports the formulation argument: UPF intake increased spontaneous calorie intake and weight gain even with diets matched for presented calories, sugar, fiber, sodium, and macronutrients. This is your anchor for “hyper-palatability and formulation change physiology, not just psychology.”  
Narula N, et al. “Association of Ultra-Processed Food Intake With Risk of Inflammatory Bowel Disease: Prospective Cohort Study.” BMJ, 2021.
    Best human disease-level citation for the episode. Supports the claim that higher UPF intake is associated with greater IBD risk, making the gut-immune link clinically meaningful rather than purely theoretical.  
Chassaing B, et al. “Randomized Controlled-Feeding Study of Dietary Emulsifier Carboxymethylcellulose Reveals Detrimental Impacts on the Gut Microbiota and Metabolome.” Gastroenterology, 2022.
    Best emulsifier paper for human translation. Supports the claim that CMC can perturb the microbiota and metabolome and may contribute to barrier-hostile gut ecology in susceptible individuals.  
Daniel N, et al. “Human Intestinal Microbiome Determines Individualized Responses to Dietary Emulsifier Carboxymethylcellulose.” Cellular and Molecular Gastroenterology and Hepatology, 2024.
    Useful nuance paper. Supports the point that emulsifier sensitivity is not identical across all people and that host-microbiome context matters.  
Shil A, et al. “Artificial Sweeteners Disrupt Tight Junctions and Barrier Function in the Intestinal Epithelium Through Activation of the Sweet Taste Receptor T1R3.” Nutrients, 2020.
    Best citation for the “sugar-free does not mean barrier-neutral” point. Supports direct epithelial barrier effects of common artificial sweeteners in experimental models.  
Peng L, et al. “Butyrate Enhances the Intestinal Barrier by Facilitating Tight Junction Assembly via Activation of AMP-Activated Protein Kinase in Caco-2 Cell Monolayers.” Journal of Nutrition, 2009.
    Classic mechanistic citation for butyrate. Supports the claim that loss of fermentable fiber and reduced butyrate production can weaken barrier function.  
Kumar KP, et al. “The Interplay Between the Microbiota, Diet and T Regulatory Cells in Maintaining Intestinal Homeostasis.” Frontiers in Microbiology, 2023.
    Useful for the tolerance language. Supports the argument that diet and microbial metabolites shape Treg biology and mucosal tolerance.  
Haase S, et al. “Sodium Chloride Triggers Th17 Mediated Autoimmunity.” Frontiers in Immunology, 2019.
    Key citation for high salt and autoimmune-prone immune skewing. Supports the claim that excess salt can promote pathogenic Th17 biology relevant to autoimmune disease.  
Wilck N, et al. “Salt-Responsive Gut Commensal Modulates TH17 Axis and Disease.” Nature, 2017.
    Strong bridge between salt, microbiome, and Th17 signaling. Supports the point that salt is not just a blood pressure story; it is also an immune-story.  
Vitales-Noyola M, et al. “Analysis of Sodium Chloride Intake and Treg/Th17 Lymphocytes in Patients With Rheumatoid Arthritis and Systemic Lupus Erythematosus.” Journal of Immunology Research, 2018.
    Helpful human-facing citation for salt and immune skewing in autoimmune populations. Use cautiously, but it strengthens translation from theory to autoimmune terrain.  
Phuong-Nguyen K, et al. “Advanced Glycation End-Products and Their Effects on Gut Health.” Nutrients, 2023.
    Good review for the AGE section. Supports the argument that AGE-rich processed foods may worsen oxidative stress, microbiota balance, and barrier function.  
Chen Y, et al. “Dietary Advanced Glycation End-Products Elicit Toxicological Effects by Disrupting Gut Microbiota and Increasing Colon Permeability in Rats.” Journal of Toxicology and Environmental Health, 2021.
    Useful mechanistic support for the processing-chemistry section. Reinforces the claim that dietary AGEs can alter microbial ecology and increase permeability.  
Monteiro CA, et al. “Ultra-Processed Foods: What They Are and How to Identify Them.” Public Health Nutrition, 2019.
 
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-Swing-Hormones/dp/0999649604
 
📲 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!

The Truth About GLP-1s

GLP-1 medications like semaglutide and tirzepatide are everywhere right now—but are they actually solving the problem?
In Episode 8 of this 16-part series on ultra-processed foods, Dr. Brendan McCarthy breaks down the truth about GLP-1 medications: how they work, why they can feel like a “miracle,” and where things go wrong when they’re used without proper medical guidance.
This isn’t about shame. It’s about understanding.
GLP-1s can quiet “food noise” and help regulate appetite—but they don’t fix your relationship with food, your metabolism, or the long-term patterns that lead to weight gain. Without structure, nutrition, and proper care, many patients end up with muscle loss, nutrient deficiencies, and rebound weight gain.
In this episode, you’ll learn:
What GLP-1 medications actually do in your body
Why they’re not a long-term solution on their own
The biggest mistakes doctors and clinics make when prescribing them
How ultra-processed foods drive weight gain in the first place
How to use GLP-1s the right way to create lasting change
The goal isn’t dependence—it’s freedom.
If you’re currently on a GLP-1 (or considering it), this episode will change how you think about your treatment plan.
 
Mechanism Anchored References
This episode is not anti medication.
It is about putting GLP 1 therapy in its proper place.
GLP 1 receptor agonists can reduce appetite pressure and alter satiety signaling.
That matters.
But quieter appetite is not the same as full recovery.
Food quality still matters.
Protein still matters.
Muscle still matters.
Structure still matters.
 
References
U.S. Food and Drug Administration. WEGOVY semaglutide injection Prescribing Information. 2025.
Wilding, John P H, et al. Once Weekly Semaglutide in Adults with Overweight or Obesity. New England Journal of Medicine, vol. 384, no. 11, 2021, pp. 989 to 1002.
Wilding, John P H, et al. Weight Regain and Cardiometabolic Effects After Withdrawal of Semaglutide The STEP 1 Trial Extension. Diabetes Obesity and Metabolism, vol. 24, no. 8, 2022, pp. 1553 to 1564.
Hall, Kevin D, et al. Ultra Processed Diets Cause Excess Calorie Intake and Weight Gain An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake. Cell Metabolism, vol. 30, no. 1, 2019, pp. 67 to 77.
Neeland, Ian J, et al. Changes in Lean Body Mass with Glucagon Like Peptide 1 Based Therapies and Mitigation Strategies. Diabetes Obesity and Metabolism, 2024.
Wilding, John P H, et al. Impact of Semaglutide on Body Composition in Adults with Overweight or Obesity Exploratory Analysis of the STEP 1 Study. 2021.
Everitt, Barry J, and Trevor W Robbins. Drug Addiction Updating Actions to Habits to Compulsions Ten Years On. Annual Review of Psychology, vol. 67, 2016, pp. 23 to 50.
Monteiro, Carlos A, et al. The UN Decade of Nutrition the NOVA Food Classification and the Trouble with Ultra Processing. Public Health Nutrition, vol. 21, no. 1, 2018, pp. 5 to 17.
 
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-Swing-Hormones/dp/0999649604
 
📲 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!

This Was Never a Fair Fight: How Ultra-Processed Food Trains a Child’s Brain

Craving junk food when you’re stressed isn’t a lack of discipline — it’s biology.
In this episode, Dr. Brendan McCarthy breaks down what ultra-processed and hyper-palatable foods actually do inside your body — from your metabolism to your hormones, your brain, and your stress response.
But this isn’t about guilt or shame.
It’s about understanding what you’re up against — especially as a parent trying to make better choices in a world designed to make that difficult.
You’ll learn:
What ultra-processed foods really are
How they impact your endocrine system and metabolism
Why stress makes you crave sugar and processed foods
Why shame around food doesn’t work (and never will)
Simple, realistic ways to improve your family’s eating habits
This episode is about taking back control — without perfection, and without guilt.
 
Mechanism-Anchored References Monteiro, Carlos A., et al. “Ultra-Processed Foods: What They Are and How to Identify Them.” Public Health Nutrition, vol. 22, no. 5, 2019, pp. 936–941. Hall, Kevin D., et al. “Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake.” Cell Metabolism, vol. 30, no. 1, 2019, pp. 67–77.e3. doi:10.1016/j.cmet.2019.05.008. Rush, E. Catherine, et al. “The Impact of Ultra-Processed Foods on Pediatric Health.” Nutrition Reviews, 2024. doi:10.1093/nutrit/nuae051. Ventura, Alison K., and John Worobey. “Early Influences on the Development of Food Preferences.” Current Biology, vol. 23, no. 9, 2013, pp. R401–R408. doi:10.1016/j.cub.2013.02.037. Mennella, Julie A., et al. “Preferences for Salty and Sweet Tastes Are Elevated and Related to Each Other during Childhood.” PLOS ONE, vol. 9, no. 3, 2014, e92201. doi:10.1371/journal.pone.0092201. Roberto, Christina A., et al. “Influence of Licensed Characters on Children’s Taste and Snack Preferences.” Pediatrics, vol. 126, no. 1, 2010, pp. 88–93. doi:10.1542/peds.2009-3433. Swindle, Taren, et al. “Pester Power: Examining Children’s Influence as an Active Component of the Family Food Environment.” Journal of Nutrition Education and Behavior, vol. 52, no. 8, 2020, pp. 801–807. doi:10.1016/j.jneb.2020.06.002. Pérez-Escamilla, Rafael, et al. “Responsive Feeding Recommendations: Harmonizing Integration into Dietary Guidelines for Infants and Young Children.” Current Developments in Nutrition, vol. 5, no. 6, 2021, nzab076. doi:10.1093/cdn/nzab076. Puhl, Rebecca M., and Chelsea A. Heuer. “Obesity Stigma: Important Considerations for Public Health.” American Journal of Public Health, vol. 100, no. 6, 2010, pp. 1019–1028. doi:10.2105/AJPH.2009.159491. World Health Organization. Set of Recommendations on the Marketing of Foods and Non-Alcoholic Beverages to Children. World Health Organization, 2010.
 
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-Swing-Hormones/dp/0999649604
 
📲 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!

This Isn’t a Willpower Problem: The Truth About Stress, Cravings & Weight Gain

In this episode, Dr. Brendan McCarthy—Chief Medical Officer at Protea Medical Center—dives into one of the most misunderstood topics in health:
Why does it feel like you can’t stick to a diet… even when you’re trying your best?
This isn’t about willpower.It’s not a character flaw.And it’s not your fault.
Dr. McCarthy breaks down the biology behind stress, cravings, and weight gain—explaining how chronic stress rewires your brain, alters decision-making, and drives you toward hyper-palatable, ultra-processed foods.
 
YouTube citations : 
1. Arnsten, Amy F. T. “Stress Weakens Prefrontal Networks: Molecular Insults to Higher Cognition.” Nature Neuroscience, vol. 18, no. 10, 2015, pp. 1376–1385.
Why it is here: Foundational paper for the claim that uncontrollable stress increases catecholamine signaling in the prefrontal cortex and degrades higher-order control, working memory, and inhibition. This is one of the strongest anchors for the idea that stress makes the pause smaller.  
2. Schwabe, Lars, et al. “Concurrent Glucocorticoid and Noradrenergic Activity Shifts Instrumental Behavior from Goal-Directed to Habitual Control.” Journal of Neuroscience, vol. 30, no. 24, 2010, pp. 8190–8196.
Why it is here: One of the most important papers for your “click-boom” model. It shows that stress chemistry can bias behavior away from goal-directed control and toward habit-like responding. That is not a morality argument. It is control architecture.  
3. Plessow, Franziska, et al. “The Stressed Prefrontal Cortex and Goal-Directed Behaviour: Acute Psychosocial Stress Impairs the Flexible Implementation of Task Goals.” Experimental Brain Research, vol. 216, no. 3, 2012, pp. 397–408.
Why it is here: Strong support for the claim that acute psychosocial stress impairs flexible goal implementation. Useful when you want to say that under stress, the person may still know what matters but have reduced access to that guidance in the moment.  
4. Maier, Silvia U., et al. “Acute Stress Impairs Self-Control in Goal-Directed Choice by Altering Multiple Functional Connections within the Brain’s Decision Circuits.” Neuron, vol. 87, no. 3, 2015, pp. 621–631.
Why it is here: Excellent for the food-choice angle. This paper supports the idea that stress increases the weight of immediately rewarding attributes and reduces self-control. In your language, the cue gets louder and the future gets quieter.  
5. Epel, Elissa, et al. “Stress May Add Bite to Appetite in Women: A Laboratory Study of Stress-Induced Cortisol and Eating Behavior.” Psychoneuroendocrinology, vol. 26, no. 1, 2001, pp. 37–49.
Why it is here: Classic paper, directly in women, directly in Psychoneuroendocrinology. Strong support for linking stress physiology, cortisol reactivity, and post-stress eating behavior.  
6. Giddens, Emily E., et al. “The Influence of Stress on the Neural Underpinnings of Disinhibited Eating: A Systematic Review and Future Directions for Research.” Reviews in Endocrine and Metabolic Disorders, 2023.
Why it is here: A modern review tying stress to food-related reward sensitivity, interoception, and cognitive control in disinhibited eating. Good bridge reference for the overall brain-food-stress model.  
7. Lyu, Z., et al. “Acute Stressors Reduce Neural Inhibition to Food Cues and Increase Eating Among Binge Eating Disorder Symptomatic Women.” Frontiers in Behavioral Neuroscience, 2016.
Why it is here: Helpful for the specific claim that acute stress can reduce inhibitory neural responsiveness to food cues and increase eating in vulnerable women. Strong fit for the cue-reactivity piece.
 
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-Swing-Hormones/dp/0999649604
 
📲 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!

The Real Reason You Crave Junk Food Under Stress

Is weight gain really about willpower… or is something deeper going on?
In this episode, Dr. Brendan McCarthy, Chief Medical Officer at Protea Medical Center, breaks down the real biology behind stress, cravings, and weight gain—and why blaming yourself (or cortisol) is missing the point.
You’ll learn:
Why chronic stress rewires your metabolism
How stress drives cravings for ultra-processed foods
The truth about cortisol and fat storage
Why “just have more discipline” is bad medicine
How ultra-processed foods hijack your hunger and reward systems
The key to rebuilding control and agency
This isn’t about motivation—it’s about understanding your biology so you can finally work with your body instead of against it.
If you’ve ever felt stuck, frustrated, or blamed for your weight… this episode is for you.
 
Mechanism-Anchored References
    1.    Glucocorticoids, stress, and eating
Kuckuck S, van der Valk ES, Scheurink AJW, et al. Glucocorticoids, stress and eating: the mediating role of appetite-regulating hormones. Obesity Reviews. 2023.
Supports the claim that stress biology and glucocorticoid signaling can alter appetite regulation and eating behavior.  
    2.    Stress-level glucocorticoids can increase hunger
Bini J, et al. Stress-level glucocorticoids increase fasting hunger and alter cerebral blood flow in neural regions that regulate food intake. 2022.
Supports the claim that stress-level glucocorticoid exposure can increase hunger and affect food-intake regulation.  
    3.    Stress-obesity link / HPA-axis context
Lengton R, et al. Glucocorticoids and HPA axis regulation in the stress-obesity link. 2024.
Supports the broader claim that chronic stress and glucocorticoid biology are relevant to obesity risk and metabolic dysregulation.  
    4.    Sleep loss changes appetite and metabolism
Van Cauter E, et al. Metabolic consequences of sleep and sleep loss. 2008.
Supports the claim that inadequate sleep alters appetite regulation and harms carbohydrate metabolism.  
    5.    Sleep deprivation impairs glucose handling and raises appetite pressure
Knutson KL. The metabolic consequences of sleep deprivation. 2007.
Supports the claim that sleep loss can worsen glucose metabolism, appetite drive, and obesity risk.  
    6.    Circadian disruption and metabolic dysfunction
Depner CM, et al. Metabolic consequences of sleep and circadian disorders. 2014.
Supports the claim that circadian disruption and sleep deficiency contribute to metabolic dysregulation and weight gain risk.  
    7.    Ultra-processed food and reward-system activation
Calcaterra V, et al. Ultra-Processed Food, Reward System and Childhood Obesity. 2023.
Supports the claim that ultra-processed foods interact with reward pathways in ways that can drive intake beyond simple calorie math.  
    8.    Ultra-processed food and metabolic dysfunction
Vitale M, et al. Ultra-Processed Foods and Human Health: A Systematic Review and Meta-Analysis. 2023.
Supports the claim that higher UPF consumption is associated with obesity and metabolic disease risk.  
    9.    Stress and poorer diet quality / emotional eating
Shatwan IM, et al. Association between perceived stress, emotional eating, and diet quality. 2024.
Supports the claim that higher perceived stress is associated with worse dietary patterns and emotional eating.  
    10.    Compassion-based framing and adherence
Sirois FM, et al. Self-Compassion and Adherence in Five Medical Samples. 2018.
Supports the closing point that shame is a weak intervention model and that compassion-linked framing may better support adherence and change.  
 
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-Swing-Hormones/dp/0999649604
 
📲 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!