How does light therapy work?

Light influences tissue repair through two complementary routes:

• Cellular bioenergetics and signaling:
  Red and near-infrared LED light (≈ 630–850 nm) increases mitochondrial ATP production and regulates reactive oxygen species (ROS) at controlled levels. This activity promotes fibroblast proliferation, keratinocyte migration, and angiogenesis - key steps in wound closure and tissue regeneration. Comparative LED PBM using 630 nm and 810 nm wavelengths showed faster wound closure and improved collagen alignment in experimental models (Tsai et al., 2022).
• Inflammation and tissue remodeling:
  LED PBM modulates inflammatory cytokines (IL-6, TNF-α) and enhances extracellular matrix formation through improved fibroblast signaling.
  A systematic review found that red and near-infrared LED PBM (610–830 nm) shortened healing time and increased collagen synthesis in chronic wounds (Gupta et al., 2023). Clinical work combining 630 nm and 850 nm LEDs also reported enhanced skin texture and elasticity - evidence of improved tissue remodeling (Kim et al., 2025)
  

Together, these mechanisms suggest a synergistic pattern: red LEDs to activate surface-level healing responses, and near-infrared LEDs to reach deeper connective tissue for repair and circulation - within an evidence-informed wellness framework.

Applications for wound healing

Light therapy can complement conventional care for a wide range of persistent complaints:

• Post-surgical and injury recovery:
  Red and near-infrared LED PBM (≈ 630–810 nm) enhances cellular energy and angiogenesis in healing tissues. In controlled models, 630 nm and 810 nm LEDs accelerated wound closure and improved fibroblast activity compared to untreated controls (Tsai et al., 2022).
  
• Chronic ulcers and delayed healing:
  A meta-analysis of LED PBM (610–830 nm) showed faster healing, improved granulation, and reduced inflammatory markers in chronic wounds and ulcers (Gupta et al., 2023). The review concluded that LED light significantly enhances microcirculation and oxygenation at the wound site.
  
• Aesthetic and dermatologic repair:
  Clinical use of combined 630 nm and 850 nm LEDs over 16 weeks led to measurable increases in skin elasticity, collagen density, and surface smoothness versus placebo (Kim et al., 2025). These results suggest that LED PBM can extend wound-healing mechanisms into long-term skin rejuvenation and structural renewal.
  

Key benefits at a glance

• Accelerated wound closure – Enhanced fibroblast activity and angiogenesis with 630–810 nm LEDs (Tsai et al., 2022).
• Improved collagen and skin structure – Clinical 630 + 850 nm LED PBM increased elasticity and tone (Kim et al., 2025).
• Reduced inflammation and oxidative stress – LED PBM lowered pro-inflammatory cytokines in wound tissue (Gupta et al., 2023).
• Non-invasive and well-tolerated – Studies report no adverse effects, even with repeated sessions (Zein et al., 2018).

Note: Effects vary with spectrum, intensity, timing, and individual sensitivity; findings for PBM in wound healing contexts are evolving.

Who can benefit?

Individuals recovering from injuries, surgery, chronic wounds, or seeking to maintain healthy skin integrity - especially those needing gentle, non-drug support for tissue repair and resilience.

How to use it in practice

Local application:
10–20 minutes, 3–5 times weekly, at a distance of 10–30 cm.

Target zones:
Areas with wounds, or slow-healing tissues.

Consistency over intensity - regular use over weeks supports cumulative effects on pain, circulation, and repair.

Scientific context

Controlled studies demonstrate significant benefits of LED PBM for wound healing and skin repair:

• Enhanced fibroblast activity and angiogenesis using 630 nm / 810 nm LEDs (Tsai et al., 2022).
• Improved collagen and dermal structure with 630 + 850 nm LEDs (Kim et al., 2025).
• Accelerated closure and reduced inflammation in chronic wounds with 610–830 nm LED PBM (Gupta et al., 2023).
• Mechanistic insights into mitochondrial activation and redox regulation via LED PBM (Zein et al., 2018).

These studies inform light based practices and do not constitute therapeutic claims for redtreat devices.

Why redtreat

We focus on research-informed light patterns - bright light tools for mornings and gentle red/NIR options for local comfort - designed for ease, consistency, and high build quality.

• Timing-first design: morning bright-light options; evening low-blue options

• Targeted PBM (≈630–1060 nm) for localized comfort routines

• Swiss engineering for precision and reliability

Disclaimer

References are provided for educational and informational purposes. They summarize general research on light therapy. They do not constitute therapeutic or clinical claims for redtreat products. Products are not intended to diagnose, treat, cure, or prevent any disease. Individuals with ongoing symptoms or medical conditions should consult a healthcare professional.

Scientific references

• Tsai C. L. et al. (2022). Comparative LED PBM (630 nm vs 810 nm) in wound healing models.
• Gupta A. et al. (2023). Red and near-infrared LED PBM in chronic wound management: systematic review and meta-analysis.
• Kim D. H. et al. (2025). 630 + 850 nm LED PBM for skin regeneration and collagen improvement.
• Zein R. et al. (2018). The science and clinical applications of LED photobiomodulation.