Evidence check: Testosteron in the context of allergy

The relationship between testosterone and allergies is not well established. Some observational studies suggest that higher testosterone levels may be associated with lower allergy prevalence, possibly due to immunomodulatory effects. However, effect sizes are small, and confounding factors (genetics, environment, lifestyle) play a major role. Direct causal evidence from controlled trials is lacking. A direct-to-consumer testosterone test in the context of allergy (e.g., from MyBody-X) is not clinically validated for this purpose. Such tests provide only a single biomarker without medical interpretation. Consumers should not rely on them for allergy diagnosis or management. The evidence level is unclear/mechanistic.