CYP1A2
CYP1A2 is the gene for the liver enzyme that clears caffeine, and its variants determine whether you are a fast or slow metabolizer. A preventive practice checks this one-time result because slow metabolizers may face higher cardiovascular risk from heavy caffeine intake, informing personalized caffeine guidance.
What It Measures
Caffeine metabolism enzyme.
Optimal vs. Lab Range
Target range for optimal health and longevity based on research.
Population-based reference range from standard labs.
Why It Matters
Slow metabolizers have elevated CV risk from high caffeine intake.
When Low
—
When Optimal
AA → fast metabolizer; standard caffeine OK.
When High
CC → slow; minimize caffeine.
How to Optimize
Genotype-appropriate caffeine; avoid late-day intake.
Key Interventions & Linked Compounds
Moderate (5/10)Key Interventions
Curated from clinical literature. Individual results vary; consult a qualified clinician before changing a protocol.
Ordering Notes
Specimen
Buccal swab or whole blood (EDTA)
Patient prep
No fasting required. Maintain usual diet and medications unless advised.
Recommended cadence
Re-test every 3–6 months when actively optimizing; annually for monitoring.
Reporting unit
genotype
Pre-analytic notes
Standardize draw time of day, hydration, and recent exercise. Note any acute illness, supplements, or hormonal therapies on the requisition.
Recommended Follow-Up Actions
- 1
Confirm the result is reliable
Repeat abnormal values before acting — preferably from the same lab, same time of day, and under consistent prep. Rule out acute illness, recent intense exercise, or medication effects that can shift CYP1A2.
- 2
Compare against optimal, not just lab range
Use the optimal window above as the target. Lab "normal" is built from the general population and often misses early dysfunction.
- 3
Pair with related markers
Order a complementary panel covering metabolic, inflammatory, and hormonal context to interpret this marker properly.
- 4
Discuss interventions with a clinician
Use the interpretation guidance above to frame the conversation. Bring trends, not just one datapoint, to your visit.
- 5
Re-test on a defined cadence
If a change is implemented, re-measure in 8–12 weeks for fast-moving markers, or 3–6 months for slower ones, to confirm response before escalating.
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