Red light penetrates tissue to promote increased blood flow and the relaxation of muscle. This type of light also stimulates fibroblasts within the dermis to produce new collagen, which accounts for its ability to reduce fine lines and wrinkles while regenerating aged or sun-damaged skin. It's like getting an injection of your own collagen! Red light stimulates fibroblasts within the dermis to produce new collagen, which accounts for its ability to reduce fine lines and wrinkles while regenerating aged or sun-damaged skin. It also penetrates tissue to promote increased blood flow and the relaxation of muscle. Light therapy is based on important research by NASA which shows that certain frequencies of light significantly increase new tissue growth, the synthesis of collagen and overall healing time after injury or surgery. LED Light Therapy stimulates the skin's fibroblasts to produce collagen and elastin proteins. LED triggers the body to convert light energy into cell energy without thermal injury to tissues. Unlike laser resurfacing, light therapy is non-thermal, non-invasive, causes no inflammation and requires no special post treatment procedures.