CYP1A2: Caffeine Metabolism

rs762551 · Drug Metabolism

CYP1A2 determines how quickly you metabolize caffeine. Fast metabolizers can drink coffee late and sleep fine; slow metabolizers may lie awake for hours.

What This SNP Does

CYP1A2 is the primary enzyme responsible for caffeine metabolism in the liver. The A allele (rs762551) is associated with faster caffeine clearance. Slow metabolizers (C allele carriers) have caffeine in their system longer, which increases both the cardiovascular risks and the jitteriness associated with coffee consumption. One study found that slow metabolizers who drank 2+ cups of coffee daily had increased heart attack risk.

Genotype Meanings

Genotype	Status	What It Means
AA	Fast metabolizer	Rapid caffeine clearance. Coffee may be cardiovascularly protective. Less sleep disruption.
AC	Intermediate	Moderate caffeine metabolism. Some cardiovascular risk with high consumption.
CC	Slow metabolizer	Caffeine stays in system longer. Limit to 1 cup morning coffee. Avoid afternoon caffeine.

What You Can Do

Slow metabolizers should limit caffeine intake and avoid it after noon. Fast metabolizers can enjoy moderate coffee consumption with potential cardiovascular benefits. Both groups should be aware that CYP1A2 also metabolizes certain medications.

This information is for educational purposes only and is not medical advice. Always consult a qualified healthcare provider before making health decisions based on genetic data. Genome Decoder does not diagnose, treat, or prevent any disease.