Background and objective: Acne vulgaris remains a major problem in dermatological practice. Phototherapy for acne with blue (415 nm) and red (633 nm) light-emitting diode (LED) arrays has recently attracted attention. This pilot study assessed the efficacy of the combination of 415 nm and near-infrared (IR) LED therapy for moderate acne.
Methods: Seventeen individuals were recruited: 13 females and four males. Skin types ranged from type II to type VI, and the acne grades at baseline ranged from Burton grade 1 to 5. Patients underwent twice-weekly 20-minute sessions of LED therapy for 4 weeks, alternating between the blue (415 nm) and near-IR (830 nm) heads. No other treatment was allowed. Results were assessed and compared with the baseline values at 1, 4 and 8 weeks post-treatment.
Results: Six individuals failed to complete the study. Eleven individuals showed improvement ranging from 0% to 83.3%. A downward shift in the Burton grade was seen overall. Non-inflammatory lesion counts increased in four patients, but improved in the other seven by an average of 48.8%. No adverse effects were reported.
Conclusions: The combination therapy for acne produced results which were less effective in the reduction of inflammatory lesions than those achieved with the previously reported blue/red combination. Further study with a much larger patient population is warranted.
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