How are TSH and Allergie related?

The direct relationship between TSH and allergies is not strongly established in evidence. TSH (thyroid-stimulating hormone) regulates thyroid function, while allergies involve immune responses to harmless substances. Some studies suggest a higher prevalence of allergies in individuals with autoimmune thyroiditis (Hashimoto), where TSH is often elevated. The mechanism may involve shared immune dysregulation or genetic predisposition. However, TSH itself is not a direct trigger or marker for allergies. Elevated TSH can indicate hypothyroidism, which may indirectly affect immune function. Consumer lab tests combining TSH and allergy markers should be interpreted cautiously: they provide screening hints, not diagnoses. For allergy assessment, specific IgE tests or skin prick tests remain the gold standard. The evidence for a direct TSH-allergy link is moderate, based on observational studies rather than randomized controlled trials.