"Red light therapy may work in skin health to: Stimulate collagen production, which gives skin its structure, strength and elasticity. Increase fibroblast production, which makes collagen. Increase blood circulation to the tissue. Reduce inflammation in cells."
Source: Cleveland Clinic — "Red Light Therapy" (Medically Reviewed)
Link: https://my.clevelandclinic.org/health/articles/22114-red-light-therapy