Acne vulgaris
Home-use blue and red LED phototherapy for mild-to-moderate acne RCT
Kwon HH, Lee JB, Yoon JY, et al. British Journal of Dermatology. 2013.
A double-blind randomized home-use trial tested combination blue and red LED phototherapy for mild-to-moderate acne.
Evidence grade
low
Effect direction
positive
Panel relevance
partially-replicable
Key findings
- The protocol used 420 nm blue and 660 nm red light for 2.5 minutes twice daily for 4 weeks.
- Inflammatory and noninflammatory lesion counts improved in the active treatment group.
- No severe adverse events were reported.
Protocol details
| Wavelengths | 420, 660 nm |
|---|---|
| Irradiance | Not reported mW/cm2 |
| Fluence | Not reported J/cm2 |
| Session time | 2.5 minutes |
| Frequency | Twice daily |
| Duration | 4 weeks, with follow-up to 12 weeks |
| Treatment area | Acne-affected facial skin |
| Device type | Home-use blue and red LED acne device |
Caveats
- This is combination blue/red phototherapy, not red light alone.
- Twice-daily treatment is device-specific and should not be generalized to all panels.