The Science
The Science
630nm Red Light Therapy
How photobiomodulation stimulates hair follicle renewal
The short version: Red light at 630nm penetrates the scalp to energize dormant follicles, increase blood flow, and extend the growth phase. No drugs. No surgery. Just light.
How It Works
When 630nm photons reach the mitochondria in follicle cells, they stimulate cytochrome c oxidase, triggering increased ATP production, nitric oxide release, and stem cell activation in the bulge region.
Clinical Evidence
| Study | Finding |
|---|---|
| Avci et al., 2014 | 37% increase in hair density at 16 weeks |
| Lanzafame et al., 2014 | Significant hair count increase vs. sham |
| Kim et al., 2013 | LED therapy effective for androgenetic alopecia |
Why 630nm?
630nm sits in the therapeutic sweet spot — deep enough to reach the dermal papilla, not so deep that energy dissipates.
care·atin — Rooted in Science. Powered by Light.