Red Light Therapy and Skin Ageing — What a 30-Session Controlled Trial Found

A 2014 controlled trial in Photomedicine and Laser Surgery tested red and near-infrared light therapy in 136 participants over 30 sessions across fifteen weeks. Both light-treated groups showed significant improvements in skin complexion, roughness, patient satisfaction, and ultrasound-measured intradermal collagen density compared with untreated controls.