Does LED Light Therapy Really Work? What Does the Scientific Evidence Say?

LED phototherapy is a non-invasive treatment that uses specific wavelengths of light to influence cellular activity, reduce inflammation and support skin health.

But does it really work? Clinical research suggests that LED phototherapy can improve certain skin conditions, although results depend on the wavelength, treatment protocol and individual skin concerns.

Blue Light (415nm) – Acne

Blue light targets Cutibacterium acnes, the bacteria associated with acne. Clinical studies support its use for mild-to-moderate inflammatory acne, although evidence quality varies.

Red Light (633nm) – Skin Rejuvenation

Red light supports cellular activity and may stimulate collagen production. Clinical trials have reported improvements in fine lines, skin texture and inflammation.

Near-Infrared Light (830nm) – Skin Repair

Near-infrared light penetrates deeper into the skin and may support tissue repair and reduce inflammation. Research suggests potential benefits for wound healing and recovery following aesthetic treatments.

What Does the Evidence Say?

Systematic reviews suggest LED phototherapy can benefit acne and skin rejuvenation, but studies vary in quality and treatment protocols. Evidence for conditions such as rosacea remains limited.

At SE Medical, we use professional Dermalux LED phototherapy as part of personalised, evidence-based skin treatment programmes.