What to watch with CYP1A2 and stress?

CYP1A2 is primarily known for caffeine metabolism. The rs762551 polymorphism (C allele = slow metabolizer) may increase risk of elevated blood pressure and cardiovascular issues with high caffeine intake – especially under stress, as stress hormones can amplify caffeine's effects. However, evidence for a direct CYP1A2-stress interaction is weak and based on mechanistic assumptions. No validated studies show a clear link between CYP1A2 variants and stress coping. Therefore, watch your caffeine consumption during stressful periods, but do not rely on genetic tests for stress management. MyBody-X tests include CYP1A2, but clinical relevance for stress is unclear. Caveat: small effect sizes, individual variability.