The Science Behind Red Light Therapy: What Does the Research Really Say?
Red light therapy (also known as photobiomodulation) has moved well beyond being a wellness trend. Today, it's being studied by universities, hospitals and researchers around the world for its potential to support skin health, wound healing, muscle recovery and inflammation.
At Lightlab, we believe in combining innovation with evidence. While research continues to evolve, there's already a growing body of clinical studies exploring how red and near-infrared light interact with the human body.
What Is Photobiomodulation?
Photobiomodulation (PBM) is the scientific name for red light therapy.
It uses specific wavelengths of red and near-infrared light to stimulate cells without generating heat or damaging tissue.
Research suggests these wavelengths are absorbed by structures inside our cells called mitochondria. These tiny "powerhouses" create ATP (adenosine triphosphate), the energy your cells need to repair and function efficiently.
Scientists believe this increase in cellular energy may help support:
- Healthy collagen production
- Improved circulation
- Reduced inflammation
- Tissue repair
- Muscle recovery
- Skin rejuvenation
Skin Health & Collagen Production
Numerous clinical studies have investigated the effects of LED photobiomodulation on ageing skin.
Research has shown improvements in:
- Skin texture
- Fine lines
- Skin elasticity
- Collagen density
- Overall skin appearance
While results vary between studies, many participants experienced noticeable improvements after several weeks of consistent treatment.
Wound Healing
One of the most researched applications of photobiomodulation is wound healing.
Recent systematic reviews suggest LED photobiomodulation may help:
- Reduce wound size
- Improve blood flow
- Support tissue regeneration
- Enhance wound bed quality
Researchers continue to investigate the optimal treatment protocols, but the overall safety profile remains encouraging.
Inflammation & Muscle Recovery
Photobiomodulation has become increasingly popular among athletes and active individuals.
Research suggests red and near-infrared light may support the body's natural recovery processes by assisting cellular repair and helping regulate inflammatory responses.
Many physiotherapists now incorporate photobiomodulation into rehabilitation and recovery programs.
Collagen Formation
Collagen is one of the body's most important structural proteins.
As we age, collagen production naturally slows, contributing to wrinkles, reduced elasticity and thinner skin.
Research suggests red light therapy may stimulate fibroblasts—the cells responsible for producing collagen and elastin—which can contribute to healthier, firmer-looking skin over time.
What Scientists Are Still Studying
Although the evidence supporting photobiomodulation continues to grow, researchers agree there is still more to learn.
Current areas of investigation include:
- Ideal treatment wavelengths
- Session duration
- Treatment frequency
- Energy dosage
- Long-term outcomes
- Which conditions respond best
Is Red Light Therapy Proven?
The answer depends on what it's being used for.
The strongest evidence currently exists for:
- Skin rejuvenation
- Wound healing
- Reducing inflammation
- Supporting tissue repair
- Pain management in some musculoskeletal conditions
For other wellness applications—including sleep, performance, cognition and longevity—early findings are promising, but larger human clinical trials are still underway.
Lightlab's Commitment to Science
At Lightlab, we follow the latest developments in photobiomodulation research to help guide our product development.
Rather than making unrealistic promises, we believe in providing technology that supports your body's natural repair processes while remaining transparent about what the current science does—and doesn't—show.
As more research becomes available, we'll continue updating our knowledge base so our community has access to evidence-based information.