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user
Why do I sleep terribly after an afternoon coffee?
aside
Caffeine has a half-life of about five hours — half of a 3 p.m. cup is still working at 10 p.m.
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Same question, two endings.
user
Why do I sleep terribly after an afternoon coffee?
ai
Caffeine's half-life is about five hours — an afternoon cup is still working at night.
user
What does “half-life” mean?
ai
Half-life means the time for a substance to drop to half its amount. In chemistry, the concept…
user
OK — so when should I have my last coffee?
ai
Could you remind me when you usually go to bed? I've lost track of the earlier details.
The side question buried the thread — and the answers got worse.
user
Why do I sleep terribly after an afternoon coffee?
aside
Caffeine's half-life1 is about five hours — an afternoon cup is still working at night.
↳ aside #1 — "half-life"
What does “half-life” mean?
Half-life means the time for a substance to drop to half its amount. In chemistry, the concept…
user
OK — so when should I have my last coffee?
aside
As covered: with a five-hour half-life, stop about eight hours before bed — for an 11 p.m. bedtime, make 2–3 p.m. the cutoff.
The side question was settled elsewhere — the thread never noticed.
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