... Hongnie,Take Beauty 1.Principle LED PDT Therapy for Skin Care and Acne Treatment system developed by company employ ... acid bacilli,skin acnes are subsequently removed. PDT(Photodynamic Therapy)This new technology is systemic administration of a photo ... skin moisture, increases skin collagen protein, intensifies skin elasticity and smoothes fine wrinkles;Anti-aging, skin whitening, freshening, skin ...