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Phototherapy with blue (415 nm) and red (660 nm) light in the treatment of acne vulgaris
Subjects received a monochromatic 415 nm blue treatment, or a polychromatic 415 nm and 660 nm treatment. Groups 3 and 4 received cool white light and 5% benzyl peroxide. Patients treated themselves 1x/day for 15 minutes for 12 weeks. At weeks 4 and 8, the red and red-blue groups achieved similar lesion reductions. At week 12, the blue-red group had significantly better results than blue alone. The blue-red group had a 76% inflammatory lesion reduction, significantly higher than the blue light, white light, and benzyl peroxide treatment.
In cataloguing this study, the “cool white light” is classified as having “unknown” wavelengths.
Treatment Time (seconds)
- Blue 415-490 nm
- Red 630-700 nm
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