Step 1
Receive your at-home kit
Everything is included for a simple collection day, with clear instructions and guidance.
Cytio Caffeine Kinetics™
Your Caffeine Profile
Measured from Real Data
You know how much caffeine you consume.
Do you know how long it stays in your system?
Why it matters
Caffeine advice is usually based on averages. Your biology is not average.
The same caffeine dose can fade quickly in one person and linger for hours in another. Cytio measures your real caffeine curve and calculates your personal half-life, so your timing guidance is based on your own data.
How Cytio Caffeine Kinetics works
This is a direct measurement workflow, designed to fit real life. No clinic visit, no guesswork, and no relying on population-level averages that may not apply to you.
Step 2
Collect samples
Download our app to receive automatic notifications when it's time to collect a sample — which is just your saliva.
Step 3
Mail it to our lab
Use the included return mailer and prepaid shipping label to send your samples back right away.
Step 4
See results in the app
Within a few days, your profile appears in the app with timing guidance you can use immediately.
Measured directly, not inferred
Why not genetic testing?
CYP1A2 genetics can suggest a tendency, but it cannot show how caffeine actually declines in your body.
Genetic report
One inherited signal
- Looks at CYP1A2 variants linked to caffeine metabolism.
- Can suggest a genetic tendency, not your real caffeine curve.
- Can't tell you how factors in real life affect metabolism.
Cytio Caffeine Kinetics™
Your measured response
- Measures actual caffeine levels over time.
- Calculates your personal half-life from real data.
- Turns your personal result into timing guidance for sleep, performance, and travel.
Genes are one input. Your measured caffeine curve shows what actually happens.
Use Cases
Practical guidance for the moments that matter most
Your Caffeine Kinetics Profile is only useful if it helps you make better decisions in real life. Cytio turns your personal results into timing guidance built around work, travel, exercise, and sleep.
Work
Focus + sleep balanceLearn when caffeine is most likely to support concentration and alertness during demanding work blocks, without pushing residual caffeine too far into the evening. That means better focus when you need it and less risk of compromising the sleep that powers the next day.
Travel
Time zone supportTraveling across time zones changes the timing problem completely. Personalized caffeine and sleep timing advice can help you stay more alert when you need to function, reduce avoidable sleep disruption, and make jet lag easier to navigate.
Exercise
Performance + recoveryUse optimized caffeine timing to support a more energized workout, better training quality, and fewer cases where a late boost quietly undermines recovery later that night. The goal is better performance now without paying for it with poorer sleep afterward.
Sleep
Protect sleep qualityUnderstand how much caffeine is likely still present in your system at bedtime. Use personalized timing guidance to reduce late-day caffeine exposure and make more informed decisions about your sleep routine.
Built for real schedules
The sampling protocol is lightweight: a few saliva samples over the course of a day, after initial caffeine consumption. Each sample takes just a moment to collect, and the method is non-invasive. It's designed to be practical on a normal day while still generating enough data to produce meaningful, personalized insights.
In short: minimal effort, high signal, and guidance you can act on.
Stay in the loop
Get launch updates and evidence-based caffeine insights
Join our newsletter for product release timelines, practical protocol examples, and deep dives into metabolism and performance science.
By subscribing, you agree to our terms and privacy policy.
- Monthly updates
- Useful only. Product milestones, science breakdowns, and real customer workflows.
- No spam, unsubscribe anytime
- We keep messages focused and concise so your inbox stays clear and relevant.