TSH (thyroid-stimulating hormone) is a key regulator of thyroid function, not a direct marker or treatment for allergies. Allergies are immune-mediated reactions (e.g., IgE, histamine), whereas TSH controls thyroid hormone production. No robust human studies show that TSH alleviates allergies. An indirect link exists in thyroid autoimmunity (e.g., Hashimoto's), which can mimic allergy symptoms – but TSH is then a diagnostic tool, not an allergy remedy. Evidence is mechanistic/speculative. Caution: Taking TSH or thyroid hormones without medical indication is dangerous (e.g., thyrotoxicosis). For allergies, standard tests (skin prick, specific IgE) and evidence-based therapies (antihistamines, allergen avoidance, immunotherapy) are recommended. A TSH test alone does not help diagnose or treat allergies.
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