Role of photobiomodulation application frequency in facial rejuvenation: randomized, sham-controlled, double-blind, clinical trial

What the authors concluded

In the ImageJ assessment, significant reductions were found in the length of the glabellar and right periorbital wrinkles in the groups treated with photobiomodulation compared to the control group (p < 0.001)." "The quantity of PBM sessions did not significantly alter the positive results achieved in terms of the satisfaction of the participants with their facial esthetics or the photographic a

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 8.05 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.