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the claim

Evening screen use suppresses melatonin production in humans.

the verdict
INSUFFICIENT LEANING
Recorded sources
7 sources for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that evening screen use suppresses melatonin production in humans?

Unclear. Several reviews and one controlled display-light experiment report that evening screen or short-wavelength light exposure suppresses melatonin, but the experimental evidence covers only small samples of young males or children, and one adolescent study found bright afternoon light reduced later melatonin rather than evening screen exposure. No retrieved item settles the general claim for humans as a whole.

Verdict: PARTIAL LEAN · 7 sources for, 1 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 7
Melatonin
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Melatonin. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Melatonin

Evidence against · 1
Afternoon to early evening bright light exposure reduces later melatonin production in adolescents
2024
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Lazar, R., Fazlali, F., Dourte, M., Epple, C., Stefani, O., Spitschan, M., & Cajochen, C. (2024). Afternoon to early evening bright light exposure reduces later melatonin production in adolescents. doi.org. https://doi.org/10.1101/2024.10.02.616112

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More for · 6
Evening Light-Emitting Diode Screen Exposure, Melanopsin-Mediated Circadian Disruption, and Optical Filtration for Sleep Hygiene: A Narrative Review in the Indian Context.
2026
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SA, D., N, E., L, B. C., & M, C. (2026). Evening Light-Emitting Diode Screen Exposure, Melanopsin-Mediated Circadian Disruption, and Optical Filtration for Sleep Hygiene: A Narrative Review in the Indian Context.. doi.org. https://doi.org/10.7759/cureus.113484

EFFECTS OF BLUE LIGHT EXPOSURE ON RAPID EYE MOVEMENT SLEEP DURATION AND MELATONIN LEVELS IN CHILDREN: A COMPREHENSIVE LITERATURE REVIEW
2026
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Krajewska, N., Bednarczyk, R., Bednarczyk, N., Binkowski, R. K., Kurek, A., Lejman, A., Mazurkiewicz, A., Sidor, H., Wołosik, M., & Zysiak, S. (2026). EFFECTS OF BLUE LIGHT EXPOSURE ON RAPID EYE MOVEMENT SLEEP DURATION AND MELATONIN LEVELS IN CHILDREN: A COMPREHENSIVE LITERATURE REVIEW. doi.org. https://doi.org/10.31435/ijitss.1(49).2026.4616

Melanopic irradiance defines the impact of evening display light on sleep latency, melatonin and alertness
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Melanopic irradiance defines the impact of evening display light on sleep latency, melatonin and alertness. (n.d.). cir.nii.ac.jp. https://doi.org/10.1038/s42003-023-04598-4

Beyond Inactivity: Assessing Psychosomatic Impacts of Prolonged Sitting and Poor Posture
2026
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Beyond Inactivity: Assessing Psychosomatic Impacts of Prolonged Sitting and Poor Posture. (2026). doi.org. https://doi.org/10.29070/dxrr8950

Blue Light Exposure in the Digital Era: Effects on Sleep Quality and Mental Well-Being: A Narrative Review
2026
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Blue Light Exposure in the Digital Era: Effects on Sleep Quality and Mental Well-Being: A Narrative Review. (2026). doi.org. https://doi.org/10.5281/zenodo.20124197

Evening exposure to a light-emitting diodes (LED)-backlit computer screen affects circadian physiology and cognitive performance
2011
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C., C., S., F., & D., A. (2011). Evening exposure to a light-emitting diodes (LED)-backlit computer screen affects circadian physiology and cognitive performance. zenodo.org. https://doi.org/10.1152/japplphysiol.00165.2011

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