Narrow-band red LED light promotes mouse hair growth through paracrine growth factors from dermal papilla.

What the authors concluded

Our data here suggest that red LED stimulates hair growth in mice and induces several potential mediators to stimulate hair growth from human dermal papilla cells. Therefore, red LED is a hopeful therapeutic modality for hair loss diseases. In addition, although LED light and low level laser share some characteristics, LED light source is more cost efficient and portable, can irradiate more surfa

Devices that emit this wavelength

Matched on wavelength within 15nm, since LED bins vary by roughly that much and a tighter match would be false precision. Where we have an irradiance figure, the session length is the time needed to reach this study's dose of 1 J/cm² at that intensity.

Matching a wavelength is not the same as reproducing a trial. Session times assume the device's published irradiance is accurate at the distance it was measured, which on brand-claim figures is often optimistic. Where a device publishes both a peak and an average we use the average, and where it publishes a falloff curve we use the lowest figure, so these times run long rather than short. Clinical protocols also control for spot size, contact and skin type in ways a home device cannot.