Treatments / Behavior
Morning light
Free
Grade None
Evidence estimate
46%
See what people report
80% interval 12 to 82% · effective n 0.8
Have you tried it?
People are trying
0 people
Overview
Outdoor light within an hour of waking to set circadian timing.
Mechanisms it may act on
- Sleep & rhythm Strong
Where the estimate comes from
- From studies (prior): 2.0
- From Reddit reports: 0.8
- From investigators here: 0.0
- From tests: 0.0
Studies
-
Assessing fatigue in myalgic encephalomyelitis/chronic fatigue syndrome patients before and after treatment with bright light therapy: A prospective randomized controlled crossover study.2025 · Sleep medicine · n=36 · Null · PubMed 40120538
-
Effects of photobiomodulation on multiple health outcomes: an umbrella review of randomized clinical trials.2025 · Systematic reviews · n=9000 · Mixed · PubMed 40770824
-
Use of either transcranial or whole-body photobiomodulation treatments improves COVID-19 brain fog.2023 · Journal of biophotonics · n=7 · Positive · PubMed 37018063
Reddit reports
Coded from public Reddit posts. People who post tend to have strong results either way.
- Helped: 3
- Partly: 0
- No change: 1
- Worse: 0
How people usually try it
Get 10-20 minutes of outdoor light soon after waking. Skip sunglasses for this window if safe.
Typical dose: 10-20 minutes each morning
Safety
Not medical advice, not a diagnosis, and not a substitute for a clinician.