Skin aging / wrinkles
Red and near-infrared light for skin complexion and collagen density controlled trial
Wunsch A, Matuschka K. Photomedicine and Laser Surgery. 2014.
A controlled trial of large-area red and near-infrared light sources reported improved skin feel, roughness, collagen density, and blinded photo ratings.
Evidence grade
moderate
Effect direction
positive
Panel relevance
panel-replicable
Key findings
- The study used large-area red and near-infrared light sources, making it unusually relevant to panel-style consumer devices.
- Treatment was delivered twice weekly for 30 sessions.
- The authors reported improvements in skin complexion measures and collagen density.
Protocol details
| Wavelengths | 611, 650, 570, 850 nm |
|---|---|
| Irradiance | Not reported mW/cm2 |
| Fluence | 9 J/cm2 |
| Session time | Not reported minutes |
| Frequency | Twice weekly |
| Duration | 30 sessions |
| Treatment area | Large-area skin exposure |
| Device type | Large-area red and near-infrared light sources |
Caveats
- This was cosmetic skin research, not treatment of a dermatologic disease.
- Device spectra were broad ranges, not identical to every 660/850 nm consumer panel.