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melatonin suppression effectPsyPost
•79% Informative
A recent study published in the journal Brain Communications found that reading on a smartphone without a blue-light filter significantly reduced melatonin levels, especially in adults, compared to reading with a blue light filter or from a printed book.
Melatonin is a hormone produced by the pineal gland in the brain that regulates sleep-wake cycles.
The study's design included a 50-minute break between the end of the reading session and bedtime, which is longer than the typical break before sleep in real-life scenarios.
The study, “Effects of evening smartphone use on sleep and declarative memory consolidation in male adolescents and young adults,” was authored by Christopher Höhn , Michael A Hahn , Georg Gruber , Belinda Pletzer , Christian Cajochen , and Kerstin Hoedlmoser .
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