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Below is a summary of this article:
Researchers reviewed four cases using red light to treat licehn planopilaris (LPP).
Using 650 nm or 660 nm light scientists reversed inflammation, LPP symptoms, and regrew natural hair.
They wrote that the patients showed “a dramatic response to LLLT [red light therapy].”
Patients experienced no adverse side effects.
Treatment Time (seconds)
Irradiance/Power Density (mW/cm^2)
Red 630-700 nm
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Some data in this summary is from the PBM Database