Afternoon light may be key to fixing Teens' sleep
NCT ID NCT04753190
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested whether bright light in the afternoon, alone or with morning light, can shift teens' internal body clocks earlier. 84 adolescents aged 18-20 followed a stable sleep schedule and then lived in a lab for a week. Researchers measured melatonin levels to track clock changes. The goal is to find better ways to reduce sleep problems and related health risks in teens.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
bright light exposure
What this could lead to
If successful, this could lead to better timing of light therapy to help teens sleep earlier and improve daytime functioning.
What could go wrong
This is a small, early mechanistic study, not a treatment trial. Results may not apply to all teens or lead to practical interventions.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Rush University Medical Center
Chicago, Illinois, 60612, United States