What Is LED Light Therapy and How Does It Work for Anti-Aging? LED light therapy is a non-invasive skincare treatment that uses specific wavelengths of light to rejuvenate the skin from within. Red (630nm) and Near-Infrared (830nm) wavelengths penetrate deep into the dermis, where they stimulate the mitochondria within fibroblast cells. This activation increases the natural production of collagen, elastin, and hyaluronic acid. LED light therapy offers a natural, clinically proven, non-invasive alternative to harsh treatments like chemical peels or injectables.