Habits
Two-Week Caffeine Cutoff Test
A two-week caffeine cutoff test steps last-caffeine time earlier in thirty-minute blocks while tracking sleep latency—finding your real cutoff, not noon by default.
A two-week caffeine cutoff test moves your no-caffeine-after time earlier in thirty-minute steps while holding bedtime, alcohol, and screens steady. Log last dose, all sources, and sleep-onset latency nightly—one early night is not proof because half-life needs several days to stabilize.
Stop adjusting when latency stays under your target for five of seven nights.
Common questions
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Can you change cutoff and bedtime at the same time?
Hold bedtime and wind-down fixed for the test window. Changing two variables at once makes it impossible to know whether caffeine or schedule moved latency.
Related terms
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