---
title: "Caffeine 6 Hours Before Bed Still Cuts Your Sleep"
url: https://stacklist.com/card/07e4cad5-32c2-44d2-a77b-0ff1bb4f5d52
source_url: "https://pmc.ncbi.nlm.nih.gov/articles/PMC3805807/"
stack: https://stacklist.com/c/wellness/stack/4dffb12a-725e-4048-883c-4782b5959050
summary: "Caffeine consumed 6 hours before bedtime significantly impairs sleep quality and duration. This research demonstrates that caffeine's effects on sleep persist well into the evening, affecting circadian rhythms and sleep architecture."
tags: "caffeine, sleep, circadian-rhythm, sleep-deprivation, health-science, timing"
key_entities: "caffeine (concept), sleep (concept), circadian-rhythm (concept), PMC/NCBI (organization)"
classification: "reference"
content_hash: "sha256:ffcc01c42fd7d904e5342c01fad7f9b5014d849c2d05a81b22965ba596c193a3"
acp_version: "0.2"
token_counts_approximate: 33
visibility: public
agent_accessible: true
status: "final"
---

# Caffeine 6 Hours Before Bed Still Cuts Your Sleep

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