Some of it may be woo, but searching Google Scholar for photobiomodulation does seem to bring up some legit looking journal articles. https://www.ncbi.nlm.nih.

Some of it may be woo, but searching Google Scholar for photobiomodulation does seem to bring up some legit looking journal articles. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5215795/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5215795/