Photobiomodulation, also known as low-level light therapy (LLLT), was discovered in the late 1960s by Hungarian Physician Endre Mester. It is a non-invasive light-based therapy using low-intensity lights to provide cellular benefits.

High-powered lasers and light-emitting diodes (LEDs) are used in light therapy treatments, although LEDs are more commonly used in LLLT. Diodes are semiconductors that convert electrical energy into light energy released in the form of photons (packets of light energy). LEDs use diffuse and unfocused rays of light that do not damage or wound the skin. In contrast, high-powered lasers use parallel and focused rays and stimulate a controlled wound response.

During photobiomodulation, light is applied at a specific wavelength and is absorbed as light, not heat.  Photons are absorbed by light-absorbing molecules in the body’s cells and tissues called chromophores to trigger biomodulation. Once absorbed, these wavelengths have been shown to beneficially affect gene expression.

Light therapy has been proven to:

• Support mitochondrial health and ATP production, the body’s fuel source  

• Promote beneficial cell signaling, including nitric oxide, for optimal physiologic performance

• Release neurotransmitters to relieve pain

• Stimulate blood circulation for delivery of oxygen and nutrition

• Reduce inflammation and oxidative stress, and encourage healing

• Assist with immune function and trigger beneficial epigenetic and protective responses

• Increase the number of fibroblasts and dermal proteins

In summary, light therapy is a non-invasive, bioregenerative treatment with both immediate and cumulative effects without the damaging effects of UV.