Rosacea and Celiac Disease: Association and Screening Recommendations
Rosacea is associated with an increased risk of celiac disease, and patients with rosacea—particularly those with gastrointestinal symptoms—should be considered for celiac disease screening with TG2-IgA antibody testing.
The Evidence for Association
Multiple high-quality population-based studies demonstrate a clear epidemiological link between rosacea and celiac disease:
- A 2017 Danish nationwide cohort study of 49,475 rosacea patients found a 46% increased risk of celiac disease (HR 1.46,95% CI 1.11-1.93) 1
- A 2016 case-control study showed rosacea patients had twice the odds of having celiac disease (OR 2.03,95% CI 1.35-3.07), with the association predominantly in women 2
- A 2024 analysis of the diverse All of Us database confirmed this relationship with an OR of 1.93 (95% CI 1.59-2.34) for celiac disease in rosacea patients 3
The association appears bidirectional: rosacea increases the risk of developing celiac disease, and both conditions may share common genetic susceptibility loci and immune dysregulation pathways 2, 4.
Clinical Approach to Screening
Who Should Be Screened
Screen rosacea patients for celiac disease when:
- Gastrointestinal symptoms are present (diarrhea, constipation, bloating, abdominal pain)
- Unexplained weight loss or failure to thrive occurs
- Other autoimmune conditions coexist (type 1 diabetes, autoimmune thyroid disease)
- First-degree relatives have celiac disease
- Refractory rosacea fails to respond to conventional therapy
The 2019 AGA guidelines emphasize that symptoms increase the pre-test probability from the population baseline of 1% to 5-10%, making serologic testing more predictive 5.
Screening Protocol
- Order TG2-IgA antibody testing as the primary screening test
- Include total IgA level to rule out IgA deficiency (which would cause false-negative results)
- Ensure the patient is consuming gluten at the time of testing—at least three slices of wheat bread daily, as gluten avoidance reduces test sensitivity 5
Important Caveats
- Negative serology does not definitively rule out celiac disease if clinical suspicion remains high; duodenal biopsy may still be warranted 5
- HLA-DQ2/DQ8 testing has limited diagnostic value but high negative predictive value—absence of these alleles essentially excludes celiac disease 5
- The association is stronger in women than men 2
Pathophysiologic Considerations
The gut-skin axis likely explains this association through several mechanisms:
- Shared genetic susceptibility between rosacea and autoimmune conditions including celiac disease 2
- Dysbiosis and immune dysregulation affecting both intestinal and cutaneous innate immunity 6, 7
- Nutritional deficiencies from malabsorption (vitamins A, D, B12, iron) potentially exacerbating inflammatory skin conditions 8
Clinical Pitfalls to Avoid
- Don't screen patients already on a gluten-free diet without first reintroducing gluten for 1-3 months 5
- Don't rely solely on negative serology in symptomatic patients—consider endoscopic biopsy 5
- Don't assume rosacea is a direct manifestation of celiac disease—it's an associated condition, not a classic dermatologic presentation like dermatitis herpetiformis 4
The 2017 rosacea consensus guidelines do not list celiac disease as a diagnostic feature of rosacea itself 9, but the epidemiological evidence clearly supports increased vigilance for celiac disease in this population 3, 1, 2.