Your Brain Forgot to Eat: ADHD, Anxiety, and the Invisible Eating Disorder – Episode 195

Hey Folks, welcome back. So glad you’re here. Here’s a question to contemplate: Can a man who forgets to eat still have disordered eating? Absolutely. And the consequences are more severe than most clinicians recognize.

In this episode of the One Small Bite Podcast, Dietitian Dude David Orozco, MS, RDN — registered dietitian nutritionist, certified intuitive eating counselor, and certified exercise physiologist — introduces Noah, the Alimentar Overthinker persona: a 37-year-old software engineer whose ADHD and generalized anxiety have created a relationship with food built on disconnection, not obsession.

David breaks down the neuroscience of ADHD and eating — explaining how dopamine dysregulation impairs appetite signaling and interoceptive awareness, citing a 2024 review in Frontiers in Psychiatry on the dopamine hypothesis and a systematic review showing that adults with ADHD face a 3.82 times greater risk of eating disorders. He then layers in the pharmacological reality: stimulant medications like methylphenidate increase dopamine and norepinephrine availability, which improves focus but simultaneously suppresses appetite, reduces the reinforcing value of food, and compresses eating into a narrow evening window — the exact time when the body is least metabolically efficient.

The episode connects these patterns to the HPA axis (referencing the previous episode on Raj and cardiovascular health), showing how meal skipping elevates cortisol, amplifies anxiety, and creates an stress-starvation feedback loop. David revisits the MUNO phenotype from Episode 191 (“Lean May Not be Healthy”) to challenge the assumption that Noah’s lean frame means he’s healthy.

The solution isn’t a rigid meal plan, it’s an Energy Rhythm: consistent, flexible, structured eating aligned with circadian biology. David introduces the 7 food groups framework (fruit, vegetables, grains, protein, dairy, fat, and fun), explaining how dietary diversity supports gut microbiome health, mental health, and immune function. He then dives into the physiology of gastric emptying and nutrient absorption — showing how fiber, protein, and fat in a balanced meal slow digestion, moderate blood sugar response, and sustain energy, while isolated simple carbohydrates spike and crash the system within minutes.

Whether you’re a man with ADHD who survives on coffee and willpower, a partner or parent who’s noticed someone running on empty, or a clinician looking to better understand neurodivergent eating patterns, this episode gives you the science, the story, and the smallest first step.

ALIMENTAR Men’s Program
Oh, and if this episode resonates with you, and you might be looking for a community that’s grounded in evidence, compassion, and support in order to build peace with food and longevity, then the Alimentar Men’s Program is a great place to start. Register today for the start of the next Alimentar Men’s Program by clicking this link: Register Here. This is a small group, so hurry because spots are filling up fast.

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References

References:
Frontiers in Psychiatry (2024). The dopamine hypothesis for ADHD: An evaluation of evidence accumulated from human studies and animal models. Frontiers in Psychiatry.

Nazar, B. P., et al. (2016). Attention Deficit Hyperactivity Disorder (ADHD) and disordered eating behaviour: A systematic review and a framework for future research. Clinical Psychology Review, 53, 109–121.

Frontiers in Nutrition (2024). Methylphenidate can help reduce weight, appetite, and food intake — a narrative review of adults’ anthropometric changes and feeding behaviors. Frontiers in Nutrition.

Goldfield, G. S., et al. (2007). Methylphenidate reduces energy intake and dietary fat intake in adults: A mechanism of reduced reinforcing value of food? American Journal of Clinical Nutrition, 86(2), 308–315.

Witbracht, M. G., et al. (2015). Female breakfast skippers display a disrupted cortisol rhythm and elevated blood pressure. Physiology & Behavior, 140, 215–221.

Frontiers in Psychiatry (2022). Anxiety and food addiction in men and women: Results from the longitudinal LIFE-Adult-Study. Frontiers in Psychiatry.

Sangha, S., Oliffe, J. L., Kelly, M. T., & McCuaig, F. (2019). Eating disorders in males: How primary care providers can improve recognition, diagnosis, and treatment. American Journal of Men’s Health, 13(3).

Nutrients (2025). Chrononutrition and energy balance: How meal timing and circadian rhythms shape weight regulation and metabolic health. Nutrients, 17(13), 2135.

Cureus (2025). Understanding the impact of the gut microbiome on mental health: A systematic review. Cureus.

Qi, X., & Tester, R. F. (2018). Dietary fiber, gastric emptying, and carbohydrate digestion: A mini-review. Starch – Stärke, 70(9-10), 1700346.

Vincent, R., et al. (1995). Gastric emptying of a solid meal is accelerated by the removal of dietary fibre naturally present in food. British Journal of Nutrition, 74(4), 539–547.