What is low-level laser therapy (LLLT)?
Low-level laser therapy (LLLT) is a treatment that uses low-intensity lasers or LEDs to stimulate cellular activity without heating tissues.
LLLT operates on the principles of Photobiomodulation (PBMT), using red or near-infrared light to promote mitochondrial function, enhance ATP production, and trigger biological repair processes.
For hair growth applications, LLLT devices target the scalp with specific wavelengths like 650 nm to support hair follicle health, stimulate dormant follicles, and extend the anagen phase of the hair growth cycle.
Related terms
Red Light Therapy
Light & Technology
Red light therapy is a non-invasive treatment that uses red wavelengths to stimulate cellular repair.
Chromophore
Light & Technology
A chromophore is a molecule or molecular structure that absorbs specific wavelengths of light.
Therapeutic window
Light & Technology
The therapeutic window in light therapy refers to the optimal dosage range (wavelength, intensity, and duration) that produces biological benefits without causing harm.
Melanin
Light & Technology
Melanin is the pigment responsible for hair, skin, and eye color.
