The relationship between lowering cortisol and allergies is complex and not fully understood. Cortisol, the stress hormone, has anti-inflammatory effects and can suppress immune responses – in theory, high cortisol might dampen allergic reactions. However, chronic stress often dysregulates the HPA axis, paradoxically promoting inflammation and worsening allergy symptoms. Studies indicate that stress reduction techniques (e.g., meditation, improved sleep) can alleviate allergy symptoms in some individuals, but direct causal evidence for cortisol lowering as an allergy therapy is lacking. MyBody-X tests measure cortisol in saliva or blood, which can reflect daily rhythms but do not diagnose allergies. Evidence is mostly mechanistic and observational; randomized controlled trials are scarce. People with allergies should prioritize proven treatments (antihistamines, allergen avoidance) and consider stress management as complementary. Claims that specific diets or supplements lower cortisol enough to treat allergies are not well supported.
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