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flag Pink noise may reduce REM sleep and worsen sleep quality, especially with background noise, according to a Penn study.

flag A University of Pennsylvania study finds that pink noise, often used to improve sleep, may reduce REM sleep by nearly 19 minutes per night and worsen overall sleep quality, especially when combined with background noise like airplane sounds. flag Researchers monitored 25 adults in a sleep lab, finding earplugs more effective than pink noise at protecting sleep. flag The study raises concerns about long-term effects, particularly for children who rely heavily on REM sleep for brain development, and suggests safer alternatives like earplugs and good sleep hygiene.

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