Disclaimer — Your Coffee Time

Key point: Your Coffee Time is an educational reference tool based on chronobiology and pharmacokinetics research. It is not a medical device, not a substitute for professional medical advice, and not a clinical diagnostic tool. Always consult your doctor before making changes to medication timing or caffeine intake.

1. Nature of this tool

Your Coffee Time provides personalised caffeine timing recommendations based on publicly available chronobiology and sleep science research. The tool uses a mathematical model built from peer-reviewed sources to estimate optimal coffee windows.

The outputs are general educational guidance, not medical prescriptions. Individual responses to caffeine vary significantly based on genetics (CYP1A2 variants), liver function, hormonal status, and many other factors not captured by this tool.

2. Medical disclaimer

Nothing on this website constitutes medical advice. In particular:

ADHD-related recommendations are based on general published pharmacokinetic data, not individual assessment
Medication interaction windows are conservative reference estimates — your actual interaction profile depends on your dose, body weight, metabolism, and other medications
If you take prescription medication, always consult your prescribing doctor before adjusting caffeine timing around medication schedules
If you are pregnant, breastfeeding, or have a cardiovascular condition, consult a healthcare professional before using caffeine timing recommendations

3. Methodology and accuracy

The caffeine timing model is based on the following published research:

Cortisol awakening response: Lovallo et al. (1996), Pruessner et al. (1997)
Caffeine half-life and sleep disruption: Drake et al. (2013), Landolt et al. (1995)
Chronotype and circadian phase: Roenneberg et al. (2007), Horne & Östberg (1976)
ADHD cortisol patterns: Isaksson et al. (2012), Hirvikoski et al. (2009)
Stimulant pharmacokinetics: published prescribing information for each drug class

Chronotype offsets, spacing multipliers, and cutoff hours are model parameters derived from these sources and involve simplifying assumptions. They represent population-level estimates, not individual predictions.

4. No warranty

This tool is provided "as is" without any warranty of any kind, express or implied. We make no guarantees about the accuracy, completeness, or fitness for any particular purpose of the caffeine timing recommendations.

We are not liable for any outcomes resulting from following the tool's recommendations, including but not limited to: sleep disruption, medication interactions, cardiovascular effects, or reduced caffeine effectiveness.

5. Advertising

Your Coffee Time displays advertisements via Google AdSense. Advertisers do not influence the tool's recommendations, methodology, or scientific content. We do not accept paid placements within the calculator interface or its results.

6. External links

This site links to third-party resources including books, apps, and research papers. We are not responsible for the content, accuracy, or privacy practices of these external sites. Links to products may not be affiliate links unless explicitly stated.

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