"In 2015, the National Library of Medicine made photobiomodulation a Medical Subject Heading term. Since then, we've seen a major increase of published studies validating the science of photobiomodulation."
"Hundreds of studies documenting the impact of red light in a clinical setting have reported a range of outcomes, including how different wavelengths of red light change the inner workings of cells and blinded clinical trials that show how red light plumps up skin features in human participants through an increase of collagen production."
Source: Stanford Medicine — "Red light therapy: What the science says" (February 24, 2025)
Link: https://med.stanford.edu/news/insights/2025/02/red-light-therapy-skin-hair-medical-clinics.html