What role does CYP1A2 play in Allergie?

CYP1A2 is a cytochrome P450 enzyme primarily known for metabolizing caffeine and various drugs. Its role in allergies is not well established. Some evidence suggests CYP1A2 may metabolize arachidonic acid and other pro-inflammatory substrates, potentially influencing allergic inflammation. Genetic polymorphisms (e.g., rs762551) have been weakly associated with asthma or allergic rhinitis in some GWAS, but effect sizes are small and findings inconsistent. The evidence is mostly mechanistic or from underpowered studies. In practice, a DNA test for CYP1A2 variants cannot diagnose or predict allergies. Lifestyle, environmental exposures, and polygenic factors dominate. Be cautious of marketing claims labeling CYP1A2 as an 'allergy gene'—the scientific support is insufficient for clinical or consumer use.