Caffeine Metabolism
One of 108 insights in your Genomic Lifestyle Optimization Report.
Fast metabolizers clear caffeine in 3–4 hours; slow metabolizers still have half left at bedtime. This explains why some people drink espresso at 8 p.m. and sleep like babies, and why you might not be one of them.
How your DNA shapes caffeine metabolism.
CYP1A2 is the liver enzyme that clears caffeine from your bloodstream. It runs Phase 1 detoxification on caffeine and a handful of related compounds, and it’s responsible for the vast majority of caffeine metabolism in most people.
Common CYP1A2 variants are associated with anywhere from rapid clearance (within a few hours) to slow clearance, where the same cup of coffee can still be circulating ten hours later. Carriers of the slow-clearance variant tend to feel caffeine’s effects longer and more strongly than fast metabolizers.
Cruciferous vegetables and cigarette smoke both speed CYP1A2 up. Grapefruit juice and certain medications slow it down. The enzyme that responds to your variant also responds to what you put around it: diet, smoke exposure, and pharmaceuticals all shift its effective rate.
The 3pm coffee that keeps your friend up half the night might be invisible to you. Or it might be exactly what’s wrecking your sleep, and you’ve been blaming the wrong thing for years.
In your report, Caffeine Metabolism is one dark card: a color marker set by your variants, the mechanism in plain language, and one practical next step.
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Food & Beverage Processing: the 9-insight cluster.
Caffeine Metabolism is one finding in a tightly related cluster. Mosaic reads the other 8 alongside it, so you see the whole biology, not an isolated data point.
About Caffeine Metabolism.
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Read insightThis is one of 108. Your report reads all of them, from one cheek swab.
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