A 42-year-old man with five months of severe insomnia that didn’t respond to standard treatments was found to have celiac disease through blood tests and stomach biopsies. After switching to a gluten-free diet, his sleep problems completely resolved within weeks along with his digestive symptoms, according to Gram Research analysis of this case report. While this is just one patient’s experience, it suggests doctors should consider testing for celiac disease when patients have unexplained chronic insomnia, especially if they also have mild stomach problems.
A 42-year-old man in Somalia suffered from five months of severe insomnia that didn’t improve with standard sleep treatments. Doctors discovered he had celiac disease—an immune condition triggered by eating gluten—after noticing mild stomach problems in his medical history. When he switched to a gluten-free diet, his sleep problems disappeared within weeks along with his digestive symptoms. While this is just one case, it suggests that celiac disease might sometimes cause sleep problems that doctors don’t usually expect, and neurologists should consider testing for celiac disease when patients have unexplained chronic insomnia.
Key Statistics
A 2026 case report documented a 42-year-old man whose five-month history of treatment-resistant chronic insomnia completely resolved within weeks after diagnosis and treatment of celiac disease with a gluten-free diet.
In this case, upper endoscopy revealed Marsh-Oberhuber type 3a changes with 42 intraepithelial lymphocytes per 100 enterocytes, confirming celiac disease in a patient whose primary presenting symptom was chronic insomnia rather than gastrointestinal complaints.
Tissue transglutaminase IgG testing showed borderline elevation at 0.70 kU/L in a patient with five months of severe nocturnal restlessness and sleep maintenance problems that had failed to respond to sleep hygiene optimization and over-the-counter medications.
The Quick Take
- What they studied: Whether celiac disease (an immune reaction to gluten in wheat and other grains) could be causing severe, long-lasting sleep problems in a patient who didn’t respond to normal sleep treatments.
- Who participated: One 42-year-old man from Somalia who had been unable to sleep properly for five months and had mild stomach discomfort that he’d ignored for years.
- Key finding: After doctors diagnosed celiac disease through blood tests and stomach biopsies, the patient switched to a gluten-free diet and his insomnia completely resolved within weeks, along with his digestive symptoms.
- What it means for you: If you have chronic insomnia that doesn’t respond to normal treatments and also experience mild digestive issues, it may be worth asking your doctor to test for celiac disease. However, this is based on one case, so it’s not yet proven that celiac disease commonly causes insomnia.
The Research Details
This is a case report, which means doctors documented the medical story of a single patient in detail. The 42-year-old man came to a neurology clinic complaining of five months of severe insomnia—he couldn’t fall asleep or stay asleep and felt very distressed. He had already tried improving his sleep habits and taking over-the-counter sleep medications without success.
Because the doctors were suspicious that something else might be causing his sleep problems, they looked more carefully at his medical history. They noticed he had mild but chronic stomach bloating and discomfort that he’d been tolerating for years. They also learned he ate a lot of wheat-based foods. These clues made them think to test for celiac disease.
The doctors performed blood tests that showed slightly elevated markers for celiac disease, then did an upper endoscopy (a camera procedure to look inside the stomach and small intestine). The biopsies confirmed celiac disease with specific tissue damage patterns. After the patient started eating a gluten-free diet, both his sleep problems and stomach symptoms improved dramatically within weeks.
Case reports are important because they can identify unusual or rare presentations of known diseases. Celiac disease is typically known for causing digestive problems, but this case suggests it might sometimes cause sleep problems as the main symptom. This type of report alerts other doctors to watch for connections they might otherwise miss. However, case reports describe only one person’s experience, so they can’t prove that something happens in most people with the condition.
This case report has several important limitations to understand: The patient’s insomnia was never measured with objective sleep tests (like sleep monitoring devices) or validated rating scales, so we only have his description of the problem. There was no formal psychiatric evaluation to rule out depression or anxiety as causes of insomnia. The improvement in sleep after starting a gluten-free diet shows a time connection (temporal association) but doesn’t prove that celiac disease caused the insomnia. The doctors acknowledge these limitations, which is good scientific practice. The case is from one patient in one location, so we can’t know if this pattern occurs in other populations.
What the Results Show
The main finding is that a patient with severe, treatment-resistant insomnia was found to have celiac disease and experienced complete resolution of sleep problems after adopting a gluten-free diet. The patient’s blood test showed borderline elevated tissue transglutaminase IgG (tTG IgG) at 0.70 kU/L, which is a marker for celiac disease. Upper endoscopy revealed inflammation and swelling in the small intestine, and biopsies showed Marsh-Oberhuber type 3a changes—a specific pattern of tissue damage characteristic of celiac disease, including partial flattening of the intestinal lining and increased immune cells.
The patient reported severe nocturnal restlessness and inability to both fall asleep and stay asleep, causing considerable psychological distress. Standard sleep hygiene improvements and over-the-counter sleep medications had provided no relief over the five-month period. Within weeks of starting a strict gluten-free diet, the patient experienced marked improvement in both insomnia and gastrointestinal symptoms.
It’s important to note that the improvement in sleep was assessed clinically—meaning the doctors asked the patient how he felt—rather than through objective measurements like sleep studies or standardized questionnaires. This means we’re relying on the patient’s subjective report of improvement rather than measurable data.
Beyond the primary sleep improvement, the patient’s chronic abdominal distension and discomfort also resolved after starting the gluten-free diet. This suggests that the gastrointestinal and neurological symptoms may have been connected through the same underlying celiac disease process. The patient had tolerated these mild digestive symptoms for years without seeking treatment, which highlights how subtle gastrointestinal presentations of celiac disease can be overlooked.
According to Gram Research analysis, previous observational studies, systematic reviews, and population-based analyses have described a possible association between celiac disease and neuropsychiatric or sleep-related symptoms. However, this case report emphasizes that chronic insomnia as the primary presenting symptom remains atypical and underreported in medical literature. Most celiac disease cases present with digestive symptoms first. This case is notable because sleep problems were the main complaint that brought the patient to medical attention, making it an uncommon presentation that doctors should be aware of.
This case report has several important limitations: (1) Only one patient is described, so we cannot determine how common this association might be; (2) Sleep problems were not objectively measured using polysomnography (sleep lab testing) or actigraphy (wearable sleep tracking devices); (3) No validated insomnia rating scales were used to quantify the severity before and after treatment; (4) No formal psychiatric evaluation was performed to rule out depression, anxiety, or other mental health conditions as causes of insomnia; (5) The improvement in symptoms after dietary change shows a time relationship but does not prove that celiac disease caused the insomnia; (6) The case comes from one geographic location (Somalia), so results may not apply to other populations; (7) There is no control group or comparison to other patients with similar presentations.
The Bottom Line
Based on this single case report, the recommendation is not to change standard practice but rather to increase clinical awareness. Neurologists and primary care doctors should consider celiac disease in their differential diagnosis when evaluating patients with chronic, unexplained insomnia—especially if the patient also reports subtle gastrointestinal symptoms or follows a wheat-heavy diet. Testing for celiac disease through blood tests (tissue transglutaminase antibodies) is relatively simple and non-invasive. However, this recommendation is based on low-level evidence (a single case), so it should not replace standard insomnia evaluation and treatment. Confidence level: Low to Moderate—this is a suggestive case that warrants further research, not definitive evidence.
This case is most relevant to: (1) Neurologists and sleep specialists evaluating patients with chronic insomnia that doesn’t respond to standard treatments; (2) Gastroenterologists who may encounter patients with atypical celiac disease presentations; (3) Primary care doctors managing patients with unexplained sleep problems; (4) Patients with chronic insomnia who also have mild digestive symptoms or eat wheat-heavy diets. This case should NOT be interpreted as meaning that celiac disease commonly causes insomnia—insomnia is very common in the general population, and most cases have other causes. People with insomnia should not assume they have celiac disease without proper medical evaluation.
In this case, the patient experienced marked improvement in insomnia within weeks of starting a gluten-free diet. However, this timeline is based on one patient’s experience and clinical assessment without objective measurements. If someone were to be diagnosed with celiac disease and start a gluten-free diet, realistic expectations would be gradual improvement over weeks to months as intestinal healing occurs, but individual responses vary significantly.
Frequently Asked Questions
Can celiac disease cause insomnia and sleep problems?
Research suggests a possible connection between celiac disease and sleep problems, though it remains uncommon. A 2026 case report documented one patient whose chronic insomnia resolved after celiac disease diagnosis and gluten-free diet adoption. However, this is based on one case, not widespread evidence, so celiac disease is not a typical cause of insomnia.
What are the signs I might have celiac disease?
Common signs include digestive problems like bloating, stomach pain, diarrhea, and constipation. However, celiac disease can also cause fatigue, headaches, joint pain, skin rashes, and neurological symptoms. Some people have mild or no digestive symptoms. If you suspect celiac disease, ask your doctor for blood tests before eliminating gluten from your diet.
Should I get tested for celiac disease if I have insomnia?
If you have chronic insomnia that doesn’t respond to standard treatments and also experience digestive symptoms or eat a wheat-heavy diet, discussing celiac disease testing with your doctor is reasonable. However, most insomnia has other causes. Your doctor can determine whether celiac testing is appropriate based on your complete medical picture.
How is celiac disease diagnosed?
Celiac disease is diagnosed through blood tests that detect specific antibodies (tissue transglutaminase IgG and IgA), followed by upper endoscopy with intestinal biopsies to confirm tissue damage. Testing must occur while eating gluten-containing foods, as a gluten-free diet can make tests negative. Consult your doctor before changing your diet.
What should I do if I think gluten is affecting my sleep?
Don’t eliminate gluten on your own before testing, as this will make celiac disease diagnosis impossible. Instead, see your doctor for proper evaluation including blood tests and possibly endoscopy. If celiac disease is diagnosed, a gluten-free diet is the treatment. Track your sleep and symptoms to share with your healthcare provider.
Want to Apply This Research?
- Users could track sleep quality on a 1-10 scale daily, noting any gastrointestinal symptoms (bloating, discomfort, changes in digestion) and dietary intake, particularly gluten-containing foods. This would help identify patterns between diet and sleep quality over time.
- If a user has been diagnosed with celiac disease or suspects they might have it, they could use the app to log their gluten intake and sleep quality to see if there’s a connection. They could set reminders to maintain strict gluten-free eating and track whether sleep improves over weeks and months.
- Long-term tracking could include weekly sleep quality averages, monthly digestive symptom assessments, and dietary adherence tracking. Users could share this data with their healthcare providers to help evaluate whether dietary changes are improving sleep and other symptoms over time.
This case report describes one patient’s experience and should not be interpreted as proof that celiac disease commonly causes insomnia. Insomnia has many causes, and most cases are not related to celiac disease. If you experience chronic insomnia, consult a healthcare provider for proper evaluation and diagnosis. Do not self-diagnose celiac disease or eliminate gluten from your diet without medical guidance, as this will interfere with accurate testing. This information is for educational purposes and does not replace professional medical advice, diagnosis, or treatment. Always consult with qualified healthcare providers before making changes to your diet or treatment plan.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.