A Novel, Hand-Held, and Low-Level Light Therapy Device for the Treatment of Acne Vulgaris: A Single-Arm, Prospective Clinical Study

Figure 1

Assessment of the antibacterial properties of low-level light therapy against Cutibacterium acnes. (a) A schematic illustration of antibacterial evaluation (created with https://BioRender.com accessed on November 21, 2022). (b) Gross images of Brucella agar plates. (c) Representative photographs showing colonies of Cutibacterium acnes irradiated with blue light-emitting diode for 20 min and cultured for 8 h and 24 h in blood agar plates (scale bar = 5 mm).

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