What role does CYP1A2 play in allergy?

CYP1A2 is a cytochrome P450 enzyme primarily known for metabolizing caffeine and certain drugs. Its direct role in allergy is not well established. Some mechanistic hypotheses suggest it may influence inflammation via metabolism of environmental toxins or arachidonic acid, but evidence is weak and mostly from in vitro studies. Genetic variants (e.g., CYP1A2*1F) affect enzyme activity, yet no consistent link to allergic diseases like asthma or rhinitis has been confirmed in human studies. Therefore, claiming that a DNA test for CYP1A2 can predict allergy risk is not supported by current evidence. The role of CYP1A2 in allergy remains unclear and speculative. Consumers should be cautious about such marketing claims.