Let’s break down what we know so far.

How Trauma Affects Digestion

1. The Gut and Brain Are Always Talking

Your gut and brain communicate constantly through nerves, hormones, and the gut microbiome. When trauma or chronic stress enters the picture, this communication can become disrupted.

For some people, this shows up as:

• IBS
• Functional dyspepsia
• GERD
• Chronic bloating or pain
• Unpredictable bowel habits

Trauma doesn’t cause these conditions outright, but it can make the gut more sensitive, reactive, or inflamed.

2. Stress Can Change the Gut Microbiome

Early life stress, including emotional neglect or difficult childhood experiences, can leave long‑lasting “fingerprints” on the gut microbiome.

This can influence:

• Immune function
• Inflammation
• How the nervous system develops
• How the body responds to stress later in life3,4

Even in adulthood, chronic stress can shift the microbiome toward more inflammatory patterns. Some studies show that adults with a history of childhood abuse have higher levels of inflammation‑related microbes.5

3. Trauma Can Make the Gut More Sensitive

Many people with trauma histories experience visceral hypersensitivity, meaning the gut feels pain from sensations that wouldn’t bother most people.6

Normal things like gas, pressure changes, or digestive movement can feel sharp, intense, or alarming.

This isn’t “in your head.” Trauma can increase stress hormones like CRH and reduce parasympathetic nervous system activity (that’s the “rest‑and‑digest,” calm state rather than the sympathetic “fight-flight-freeze” nervous system). Together, these hormone and nervous system imbalances can make the gut more reactive.7,8,9

4. Trauma Can Affect Eating Patterns—and Vice Versa

There’s a strong connection between digestive disorders and eating disorders. In one study, 90% of people with an eating disorder had at least one disorder of gut‑brain interaction, also known as a DGBI.10

Sometimes GI symptoms (like nausea, bloating, or pain) lead to food avoidance. Other times, disordered eating behaviors create or worsen GI symptoms. Trauma often sits underneath both.11

This can make recovering from disordered eating feel confusing and complicated. But understanding the gut‑brain connection can bring clarity and self-compassion.

Why This Matters for Healing

If you’ve lived through trauma and now struggle with chronic GI symptoms, you may feel frustrated, discouraged, or disconnected from your body. Many clients tell me they don't trust their bodies, and their gut symptoms feel unpredictable. They feel their bodies are failing them.

But here’s the truth:

Your body is not failing you—it’s responding to a flawed environment the best way it knows how.

Your symptoms are not failings. They’re communication.

A Trauma‑Informed Approach to Gut Healing

Healing the gut in the context of trauma requires gentleness, curiosity, and collaboration—not rigid food rules or harsh elimination diets.

A supportive approach may include:

• Exploring your symptoms and history with compassion
• Understanding how stress affects your gut
• Adding nourishing foods rather than restricting
• Keeping simple food + symptom logs
• Working alongside mental health providers
• Rebuilding trust in your body, slowly and safely

Research shows that people with GI conditions often experience more anxiety, depression, and food‑related stress when starting nutrition therapy.12 A trauma‑informed dietitian can help reduce that burden rather than adding to it.

You Deserve Care That Sees the Whole You

Your gut symptoms are real. Your history matters. And your healing doesn’t have to be overwhelming.

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When we understand the gut‑brain axis through a trauma‑informed lens, we can finally see your symptoms not as random or “broken,” but as meaningful—and treatable.

If you’d like support navigating your gut symptoms with compassion and science, I’m here to help. You can send me a message here or schedule a free discovery call here.

If you’re interested in learning more but not ready for 1:1 nutrition therapy yet, I’ve also got a comprehensive IBS course where I walk you through diagnosis, treatment, and maintenance, using the same trauma-informed approach I use in session with my clients. We do cover intensive dietary interventions like the low-FODMAP diet, but alongside other gentler and more trauma-appropriate approaches like FODMAP-gentle, gut-directed hypnotherapy, lifestyle-supportive interventions, and more. 

Lastly, a note to other healthcare professionals: I’ve got a book on this! Chapters 2-3 of my book, Trauma-Informed Care: An Integrative Nutrition Approach to Empowered Healing, go much, much deeper on physiological impacts of trauma, including GI-specific impacts, than we can go here (plus 14 CEUs for RDs, DTRs, and CDCESs).   

References:

1. Glynn, H., Möller, S. P., Wilding, H., Apputhurai, P., Moore, G., & Knowles, S. R. (2021). Prevalence and Impact of Post-traumatic Stress Disorder in Gastrointestinal Conditions: A Systematic Review. Digestive diseases and sciences, 66(12), 4109–4119. https://doi.org/10.1007/s10620-020-06798-y
2. Szkodny, L. E., Bardach, S. H., Hacker, K., Tormey, L. K., Gohres, K., Siegel, C. A., & Salwen-Deremer, J. K. (2025). Implementation of a Trauma-Informed Care Approach in a Gastroenterology Setting. Digestive diseases and sciences, 70(1), 119–127. https://doi.org/10.1007/s10620-024-08766-2
3. Leclercq, S., Forsythe, P., & Bienenstock, J. (2016). Posttraumatic Stress Disorder: Does the Gut Microbiome Hold the Key?. Canadian journal of psychiatry. Revue canadienne de psychiatrie, 61(4), 204–213. https://doi.org/10.1177/0706743716635535
4. Winder, C., Lodhia, A., Basso, M., Kadosh, K. C. (2025). Gut microbiome differences in individuals with PTSD compared to trauma-exposed controls: a systematic review. Frontiers in Neuroscience, 19. https://doi.org/10.3389/fnins.2025.1540180  
5. Rohr, J. C., Bourassa, K. A., Thompson, D. S., Fowler, J. C., Frueh, B. C., Weinstein, B. L., Petrosino, J., & Madan, A. (2023). History of childhood physical abuse is associated with gut microbiota diversity among adult psychiatric inpatients. Journal of affective disorders, 331, 50–56. https://doi.org/10.1016/j.jad.2023.03.023
6. Farzaei, M. H., Bahramsoltani, R., Abdollahi, M., & Rahimi, R. (2016). The Role of Visceral Hypersensitivity in Irritable Bowel Syndrome: Pharmacological Targets and Novel Treatments. Journal of neurogastroenterology and motility, 22(4), 558–574. https://doi.org/10.5056/jnm16001
7. Fuentes, I. M., & Christianson, J. A. (2018). The Influence of Early Life Experience on Visceral Pain. Frontiers in systems neuroscience, 12, 2. https://doi.org/10.3389/fnsys.2018.00002
8. Dudzińska, E., Grabrucker, A. M., Kwiatkowski, P., Sitarz, R., & Sienkiewicz, M. (2023). The Importance of Visceral Hypersensitivity in Irritable Bowel Syndrome-Plant Metabolites in IBS Treatment. Pharmaceuticals (Basel, Switzerland), 16(10), 1405. https://doi.org/10.3390/ph16101405
9. Lawrence, S., & Scofield, R. H. (2024). Post traumatic stress disorder associated hypothalamic-pituitary-adrenal axis dysregulation and physical illness. Brain, behavior, & immunity - health, 41, 100849. https://doi.org/10.1016/j.bbih.2024.100849
10. Stanculete, M. F., Chiarioni, G., Dumitrascu, D. L., Dumitrascu, D. I., & Popa, S. L. (2021). Disorders of the brain-gut interaction and eating disorders. World journal of gastroenterology, 27(24), 3668–3681. https://doi.org/10.3748/wjg.v27.i24.3668
11. Werlang, M. E., Sim, L. A., Lebow, J. R., & Lacy, B. E. (2021). Assessing for Eating Disorders: A Primer for Gastroenterologists. The American journal of gastroenterology, 116(1), 68–76. https://doi.org/10.14309/ajg.0000000000001029
12. Fink, M., Simons, M., Tomasino, K., Pandi, A., Taft, T. (2022). When is patient behavior indicative of avoidant restrictive food intake disorder (ARFID) vs reasonable response to digestive disease? Clinical Gastroenterology and Hepatology, 20(6), P1241-1250. https://doi.org/10.1016/j.cgh.2021.07.045

When you're healing from trauma, your nervous system may feel stuck in overdrive—leaving you anxious, exhausted, or disconnected from your body. The good news? What you eat can help. Certain nutrients play a powerful role in calming your nervous system, supporting brain function, and reducing inflammation. Here’s how to use food as part of your healing journey.

Prebiotic Fiber and Polyphenols: Gut Health and Mood

• Prebiotic fiber feeds the good bacteria in your gut, which helps reduce inflammation in both your digestive system and your brain.
• Found in: leeks, asparagus, onions, garlic, oats, beans, mushrooms, chickpeas, cashews, pistachios
• Polyphenols are plant compounds that support gut health and help regulate inflammation. Some types may even calm an overactive nervous system.
• Found in: berries, grapes, plums, eggplants, tomatoes, olive oil, red peppers, sweet potatoes

Omega-3s: Calming and Protective

• These healthy fats help balance your nervous system, support brain health, and reduce inflammation.
• Found in: salmon, sardines, anchovies

B Vitamins: Fuel for Your Brain

• Thiamin, Riboflavin, Niacin, B6, Folate, and B12
• B vitamins help your body make neurotransmitters—the chemical messengers that regulate mood, energy, and sleep. They also support your parasympathetic nervous system (the “rest and digest” mode). Several are also important in preventing damage from hyperarousal in the brain (AKA glutamate excitotoxicity).
• Found in: whole grains, beans, lentils, nuts, meat, poultry, fish, dairy, eggs, spinach, asparagus

Antioxidants: Fighting Stress and Inflammation

• Vitamin C, Vitamin E, Magnesium, Zinc, and CoQ10 help protect your brain and body from the wear and tear of chronic stress.
• Found in: citrus fruits, strawberries, bell peppers, broccoli, nuts, seeds, avocado, leafy greens, seafood, meat

Vitamin D: Mood and Sleep Support

• Helps regulate serotonin, dopamine, and melatonin—key players in mood, motivation, and sleep.
• Found in: fatty fish, eggs, fortified dairy, mushrooms exposed to sunlight

Putting It All Together

You don’t need to memorize every nutrient. Instead, focus on building meals with:

• A variety of colorful fruits and vegetables
• Legumes and whole grains, if you tolerate them
• Healthy fats like nuts, seeds, and olive oil
• Quality protein from fish, poultry, eggs and plants

Eating this way supports your body’s natural healing processes and can support your body and brain in getting the most out of trauma treatment.

Get Support

Research shows that individuals with trauma experience tend to have a harder time eating a diet that meets their bodies’ needs. That makes perfect sense, given the strain and mental load of being primed to constantly expect stress. If cooking, meal planning, or even just eating regularly feels like a lot, reach out. Let’s work together to bring a nourishing lifestyle within your reach.

Erica Golden, RDN, LD, IFNCP

IBS & Mental Health Dietitian

​Interested in working with Erica? Schedule a discovery call.

Health care professional looking to learn more about trauma-informed care? Check out Erica's brand new book, Trauma-Informed Care: An Integrative Nutrition Approach to Empowered Healing.