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Caffeine reduces sleep quality in afternoon intake

Research shows that drinking caffeine after midday significantly disrupts sleep architecture.

July 17, 2025 at 03:21 PM

Scientists pinpoint exactly how a cup of coffee can change the brain

New research reveals that caffeine affects brain sleep architecture, urging caution for afternoon intake.

Caffeine consumption impacts sleep quality and brain activity

A study from the University of Montreal highlights how drinking caffeine after midday can significantly harm sleep quality. Researchers monitored the brain activity of 40 healthy adults using EEG while they consumed caffeine. Results show that even moderate caffeine intake disrupts non-REM sleep, which is critical for bodily restoration. Professor Philipp Thölke emphasized the need for awareness about caffeine's effects on sleep architecture, as caffeine can lead to shallower sleep and increased brain activity during rest periods.

Key Takeaways

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Caffeine intake after midday negatively impacts sleep quality.

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Moderate caffeine consumption disrupts non-REM sleep crucial for recovery.

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Younger adults show more response to caffeine during REM sleep.

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Sleep deprivation can lead to serious health consequences.

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Less restorative sleep leads to increased brain activity during rest.

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Public awareness of caffeine's impact on sleep is needed.

"The widespread use of caffeine among the public makes this topic an important health consideration."

This highlights the relevance of understanding caffeine's impact on sleep.

"Caffeine delays but does not prevent sleep, leading to shallower sleep."

This emphasizes the negative effects of caffeine on sleep quality.

"Younger adults are more susceptible to caffeine’s stimulant effects during REM sleep."

This indicates age-related differences in sleep quality due to caffeine.

"Caffeine has the ability to restructure the brain and impact how well we sleep."

This serves as a vital reminder of caffeine's powerful effects on health.

This research underscores the potential risks of caffeine, especially as many people rely on it for energy. The findings suggest a growing need for public awareness about the timings of caffeine consumption, particularly in a society that values productivity over rest. As sleep issues continue to rise—reported by nine out of ten people—understanding how stimulants like caffeine affect sleep may be vital in addressing widespread sleep disorders and their related health implications.