Podcast

Ultra-Processed Foods & Autoimmunity

Podcast · 19 min · Apr 22, 2026 · Dr. Brendan McCarthy

About this episode

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 pure

This content is for education and is not medical advice. It does not replace an evaluation with a licensed provider, and no one should start, stop or change a medication on its basis.

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