What wavelengths are used in red light therapy?
Red light therapy utilizes specific wavelengths of visible red and near-infrared (NIR) light—typically between 630 nm and 850 nm—to support skin health, reduce inflammation, and aid in muscle and joint recovery. These wavelengths are selected based on their ability to penetrate the skin and stimulate mitochondrial activity, thereby promoting cellular repair and regeneration.
Common Red Light Therapy Wavelengths & Their Uses
630 nm (Visible Red Light)
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Primary Benefit: Skin rejuvenation
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Applications: Improves skin texture, reduces fine lines, supports collagen production
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Clinical Reference: Study on red light for wrinkle reduction – PubMed
660 nm (Visible Red Light)
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Primary Benefit: General skin healing
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Applications: Wound healing, inflammation reduction, skin tone improvement
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Clinical Support: NIH resource on LED light and phototherapy
850 nm (Near-Infrared Light)
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Primary Benefit: Deep tissue support
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Applications: Joint pain relief, muscle recovery, deeper cellular stimulation
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Clinical Evidence: NIH Review on NIR photobiomodulation
Why These Wavelengths Work
These light wavelengths are non-invasive and safe, avoiding the risks associated with UV exposure. When absorbed by the mitochondria, they boost ATP (cellular energy) production, enhance circulation, and reduce oxidative stress—key elements in tissue repair and anti-aging effects. Deeper wavelengths like 850 nm go beyond the dermis, affecting muscles and joints.
Choosing the Right Wavelength for Your Needs
If you're unsure, combination LED devices that offer both red and near-infrared light (e.g., 660 nm + 850 nm) provide comprehensive coverage for skin and deeper tissue care.
Final Takeaway
Red light therapy primarily relies on 630–660 nm for skin and 850 nm for deep tissue, backed by peer-reviewed research and clinical usage. Always follow device guidelines and consult a healthcare provider before starting treatment to ensure safe and effective use.
Disclaimer: This content is for informational purposes only and is not a substitute for professional medical advice.