How are HLA-DQ2 and Schlaf related?

HLA-DQ2 is a genetic variant strongly associated with celiac disease. Its link to sleep (Schlaf) is indirect: in celiac disease, the immune response to gluten can cause inflammation, nutrient deficiencies (e.g., iron, vitamin B12), and gastrointestinal symptoms that disrupt sleep. Studies indicate that individuals with untreated celiac disease more frequently report fatigue, insomnia, and restless legs syndrome. Similar mechanisms may occur in non-celiac gluten sensitivity. However, the relationship is not direct; not all HLA-DQ2 carriers develop celiac disease or sleep disturbances. Evidence comes from observational studies, not randomized controlled trials, so the strength is moderate. If someone has sleep issues and carries HLA-DQ2, they should consult a physician for celiac screening and further evaluation. Other factors like stress and lifestyle also play a role. Overall, the association is moderate and requires individualized medical assessment.