Red Light Therapy for Psoriasis
Written by RedLightOS Research Team · Photobiomodulation Research, Clinical Protocol Development
The Bottom Line
Red light therapy at 633-660nm may reduce psoriatic plaque severity by modulating T-cell inflammation and keratinocyte proliferation. Dose: 4-15 J/cm², 10-20 minutes, 3-5x/week for 4-12 weeks. Not the same as UV phototherapy (311nm). Evidence grade: B (moderate — limited but positive clinical data).
How Does Red Light Therapy Help Psoriasis?
Red wavelengths modulate immune cell activity in psoriatic plaques, reduce T-cell-mediated inflammation, decrease keratinocyte hyperproliferation, and promote normal skin cell differentiation.
Recommended wavelengths: 633nm, 660nm, 830nm
What Does the Research Say?
Research for this specific application is limited. The mechanisms described above are supported by the broader photobiomodulation literature, but dedicated randomized controlled trials for psoriasis are still needed.
Recommended Protocol
| Wavelengths | 633nm, 660nm, 830nm |
| Dose Range | 4-15 J/cm² |
| Session Duration | 10-20 min |
| Frequency | 3-5x/week |
| Time to Results | 4-12 weeks |
| Evidence Grade | Grade B |
Contraindications & Cautions
- !Do not replace prescribed psoriasis medication without medical guidance
- !Photosensitizing psoriasis medications may increase skin sensitivity
What We Don't Know Yet
Evidence is moderate — based on limited randomized controlled trials. Larger, more rigorous studies are needed. Optimal dosing parameters are not yet standardized across research groups.
Frequently Asked Questions
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Research Basis
This content is informed by 47+ published peer-reviewed studies on photobiomodulation.
RedLightOS Research Team
Photobiomodulation Research
The RedLightOS team reviews over 9,500 published photobiomodulation studies to deliver evidence-based red light therapy guidance.
Reviewed by RedLightOS Research Team. Last reviewed: . Based on published photobiomodulation research. For educational purposes only — not a substitute for professional medical advice. See our methodology.
Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. Consult your healthcare provider before starting red light therapy for psoriasis. Red light therapy devices are wellness devices and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary.
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