Quick answer
CYP1A2: definition
CYP1A2 is a liver enzyme responsible for metabolizing most of the caffeine you consume; genetic variants influence whether you clear caffeine faster or slower.
CYP1A2, explained
The rs762551 variant is commonly used to classify people as “fast” or “slow” caffeine metabolizers. Smoking, some medications, pregnancy and oral contraceptives also affect CYP1A2 activity.
Why it matters
Knowing your tendency can help you time caffeine to protect sleep and avoid jitters.
Learn more
Related terms
FAQ
CYP1A2 FAQs
What is CYP1A2?
Why does CYP1A2 matter?
Answers
Related questions
Our partner store
Shop 10X Health
Genetic testing, the 10X Health System and daily supplements — straight from the official 10X Health store. Save 10% through our links.
- Save 10%
New · Weight & metabolism10X Health Metabolism Genetic Test Shop now (opens 10X Health in a new tab; affiliate link) - Save 10%
Wellness genetics10X Health Methylation + Genetic Test Shop now (opens 10X Health in a new tab; affiliate link) - Save 10%
Personalized approachThe 10X Health System Shop now (opens 10X Health in a new tab; affiliate link) - Save 10%
Daily foundations10X Health Foundations Shop now (opens 10X Health in a new tab; affiliate link)
Affiliate disclosure: Live10X is an independent educational site. If you purchase through our 10X Health links, we may earn a commission at no extra cost to you. It never changes what we write. Read our affiliate disclosure.
See everything we coverThese statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.
Stop guessing. Start with data — and a plan.
Take the free wellness assessment to find your highest-leverage focus areas, then explore genetic testing when you're ready to personalize further.
“Shop 10X Health” is an affiliate link — we may earn a commission at no extra cost to you. Affiliate disclosure