Hair growth / androgenetic alopecia
650 nm laser cap for female androgenetic alopecia multicenter RCT
Friedman S, Schnoor P. Dermatologic Surgery. 2017.
A multicenter RCT tested a 650 nm laser cap-style device in healthy females with androgenetic alopecia.
Evidence grade
moderate
Effect direction
positive
Panel relevance
not-panel-replicable
Key findings
- The trial reported a 51% increase in hair counts in the active treatment group compared with sham.
- Treatment was every other day for 17 weeks.
- Participants had mild-to-moderate female pattern hair loss.
Protocol details
| Wavelengths | 650 nm |
|---|---|
| Irradiance | Not reported mW/cm2 |
| Fluence | Not reported J/cm2 |
| Session time | Not reported minutes |
| Frequency | Every other day |
| Duration | 17 weeks |
| Treatment area | Scalp |
| Device type | Laser diode cap |
Caveats
- Device geometry and scalp proximity are central to the protocol.
- Results should not be used to claim that general-purpose body panels regrow hair.