Photobiomodulation, also known as low level laser therapy (LLLT), is an emerging medical and veterinary technique in which exposure to low-level laser light or light emitting diodes stimulate cellular function leading to beneficial clinical effects.

Laser Therapy is the application of red light and near infrared radiation over injuries or lesions to stimulate healing and relieve pain without sensation or side effects. It is popularly used for the treatment of sports injuries, several different chronic pain syndromes and non-healing wounds such as venous and diabetic ulcers. Many new applications for this treatment are being used and investigated including smoking cessation, weight loss, addiction therapy, nerve regeneration for spinal cord injuries, and muscle atrophy for astronauts on long term space missions. The term adopted by NASA and U.S. military scientists is Photobiomodulation. Effectiveness of Laser Therapy depends on the color of the light (wavelength), intensity, and total energy delivered