Effectiveness of photobiomodulation therapy on wavelengths and light pulsing frequencies

Abstract

Photobiomodulation (PBM) therapy using red and near infrared light has been reported effective for reduction of pain, reduction of inflammation, wound healing, skin rejuvenation, hair growth, fat loss, slowing or stopping and even reversing progress of neurodegenerative diseases such as Alzheimer’s disease (AD) and Parkinson’s disease (PD). Most of the clinical trial results of PBM therapy have been reported effective depending on the light pulsing frequencies and wavelengths of light of PBM therapy devices. Many PBM therapy devices for personal and home use have been introduced for PBM therapy, but the optical and electrical parameters of the PBM devices have not been clearly specified, which makes it difficult and confused for users to select PBM devices suitable for their applications. In this paper, the most frequently used PBM therapy conditions including wavelengths, light pulsing frequencies, and applications of the PBM therapy devices in the clinical papers were analyzed.