# Coffee, caffeine, and sleep: a systematic review of epidemiological studies and randomized controlled trials

Clark I, Landolt HP · Sleep Medicine Reviews 31:70–78 · 2017



## Key finding

Caffeine prolongs sleep latency, reduces total sleep and deep sleep; sensitivity varies with genetics and habitual use.



[Read the paper](https://pubmed.ncbi.nlm.nih.gov/?term=Coffee,+caffeine,+and+sleep:+a+systematic+review+of+epidemiological+studies+and+randomized+controlled+trials)

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Educational summary of published research, not medical advice. Screening scores are not diagnoses. If a score is elevated or you feel unwell, talk to a clinician.

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