Can bright light beat COVID fatigue? tiny trial hints at hope

NCT ID NCT05677932

Completed Symptom relief Sponsor: Chinese University of Hong Kong Source: ClinicalTrials.gov ↗

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This small study tested whether sitting under a bright light for 30 minutes a day for two weeks could help people with long-lasting fatigue after COVID-19. Twelve adults who had been tired for months after their infection took part. The goal was to see if the light therapy could reduce their tiredness, sleep problems, and low mood.

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 therapy (device)
What this could lead to: If it works, this could point toward a simple, non-drug way to reduce fatigue after COVID-19.
What could go wrong: This is a very small, early trial with only 12 participants. The results may not apply to everyone, and the effect may be small or due to chance.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

COVID-19 Fatigue long COVID-19 post-COVID-19 disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

POST COVID-19 CONDITION

Contacts and locations

Locations

The Chinese University of Hong Kong

Hong Kong, Hong Kong

More trials for these conditions

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