If you’re tired of dull, sagging, or sun-damaged skin and searching for a safe, effective alternative to harsh treatments, you’re not alone. Photo-ageing—caused by years of sun exposure, environmental stressors, and natural collagen loss—can leave skin looking tired, wrinkled, and lacking elasticity. But what if the solution was as gentle as light itself?

A groundbreaking 2021 study published in the International Journal of Cosmetic Science (DOI: 10.1111/ics.12698) reveals that a combination of low-level red and near-infrared (NIR) LED light could be the key to reviving ageing skin. Conducted by researchers at The Johnson & Johnson Skin Research Center, this in vitro study dives deep into how targeted light therapy stimulates collagen, elastin, and cellular energy—all critical for youthful, resilient skin.

What Did the Study Investigate?

Light therapy has long been hailed for its safety in addressing skin concerns, but most clinical applications use high-energy doses. This study set out to test a gentler approach: low-level red (640 nm) and near-infrared (830 nm) LED light delivered at just 0.5 mW/cm² for 10 minutes daily (total energy: 0.3 J/cm²). The goal? To measure its impact on:

• Collagen and elastin production (the building blocks of firm, elastic skin)
• Gene expressions linked to skin structure and anti-ageing
• ATP production (cellular energy that fuels skin repair)
• Crosslinks in collagen and elastic fibres (which enhance skin strength and flexibility)

The researchers tested this light combination on two key models: human dermal fibroblasts (the skin cells responsible for producing collagen and elastin) and human skin explants (actual skin tissue samples), ensuring results that closely mirror real-world skin responses.

The Results: A Win for Gentle Anti-Ageing

The findings were nothing short of impressive—proving that low-energy light can deliver powerful anti-ageing benefits:

1. Boosted Key Anti-Ageing Genes: The treatment significantly increased expressions of LOXL1, ELN, COL1A1, and COL3A1. These genes are critical for:
   • COL1A1 and COL3A1: Producing type I and type III collagen (the most abundant collagens in skin, responsible for firmness and plumpness)
   • ELN: Synthesizing elastin (the protein that gives skin its stretch and bounce)
   • LOXL1: Forming crosslinks in collagen and elastin, which strengthen skin structure and prevent sagging
2. Increased Protein Production: In fibroblast cultures, the light combination stimulated higher levels of procollagen type I (the precursor to mature collagen) and elastin proteins—directly addressing the root cause of wrinkling and laxity.
3. Enhanced Skin Tissue Health: In human skin explants, the treatment led to more type III collagen, thicker elastic fibres, and stronger crosslinks—signs of healthier, more resilient skin structure.
4. More Cellular Energy: ATP production (the “fuel” that powers skin cell repair and regeneration) increased in fibroblasts after treatment, giving skin the energy it needs to heal and renew itself.

Why This Matters for Your Skin

Photo-aged skin loses collagen and elastin over time, leading to fine lines, wrinkles, and a loss of firmness. Harsh treatments like chemical peels or high-energy lasers can irritate skin, while topical products often struggle to penetrate deep enough to stimulate cellular change.

This study shows that low-level red + NIR LED light offers a safe, non-invasive alternative. By targeting the cells that produce skin’s support structure, it works from the inside out to:

• Reduce the appearance of fine lines and wrinkles
• Improve skin firmness and elasticity
• Restore a more youthful, radiant complexion
• Support long-term skin health without irritation

How to Incorporate Low-Level LED Light Into Your Routine

The best part? This technology is increasingly accessible for at-home use. Look for LED devices that combine 640 nm red light (for surface-level skin renewal) and 830 nm NIR light (which penetrates deeper to target fibroblasts). When using these devices:

• Follow the study’s lead: Opt for low-energy doses (around 0.3 J/cm²) and consistent daily use (10 minutes per session).
• Be patient: Collagen and elastin production takes time—expect to see visible improvements in 4–8 weeks of regular use.
• Pair with a gentle skincare routine: Use hydrating serums (like hyaluronic acid) and broad-spectrum SPF to protect your skin and enhance results.

The Bottom Line

The Johnson & Johnson Skin Research Center’s study confirms what many skincare enthusiasts have suspected: low-level red + near-infrared LED light is a science-backed, gentle solution for photo-aged skin. By stimulating collagen, elastin, and cellular energy, this therapy offers a way to reverse signs of ageing without harsh chemicals or invasive procedures.

If you’re ready to trade dull, sagging skin for a firmer, more radiant complexion, it’s time to embrace the power of light. With consistent use, low-level LED therapy could be the missing piece in your anti-ageing routine—proven by science, gentle on skin, and transformative in results.

Source: Li, W.-H., Seo, I., Kim, B., Fassih, A., Southall, M. D., & Parsa, R. (2021). Low-level red plus near infrared lights combination induces expressions of collagen and elastin in human skin in vitro. International Journal of Cosmetic Science, 43(3), 311–320. https://doi.org/10.1111/ics.12698