How are Progesteron and allergy related?

The relationship between progesterone and allergies is not clearly established in the scientific literature. Progesterone, a key female sex hormone, modulates immune function—it can have both anti-inflammatory and pro-inflammatory effects depending on the context. Some studies suggest it may influence allergic responses by altering T-cell balance or histamine release. However, effects are highly individual and depend on menstrual cycle phase, pregnancy, or hormone therapy. In clinical practice, no validated genetic or biomarker test (including consumer DNA tests like MyBody-X) can reliably predict how progesterone affects a person's allergy risk or severity. The evidence is mostly mechanistic or from small observational studies; large-scale human trials are lacking. Caveat: while hormonal fluctuations may correlate with allergy symptoms, causation is not proven. Any interpretation of hormone-related allergy patterns should be done by a physician, not based on direct-to-consumer tests alone.