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PDT using Levulan and a proprietary blue light is currently FDA approved for the treatment of skin precancers called actinic keratosis (rough scaly spots generally on sun-exposed skin). PDT is also known as "ALA/PDT treatment" or "Super Blue Light." It has been referred to as a "super photo facial" when the photosensitizer is used with a machine called intense pulsed light or IPL. These treatments may help remove sun-damaged precancerous skin. Sun damage, fine lines, and blotchy pigmentation may also be improved because of the positive effect of PDT. PDT also has been shown to help decrease the appearance of pores and reduce oil glands, effectively treating some stubborn acne, rosacea, and improving the appearance of some small superficial acne scars.
Although PDT's use in skin was first investigated in 1990s for actinic keratosis, it was not as popular or widely used because of the required long incubation times (usually 18-24 hours) and limited indications. Since approximately 2001, PDT has become more widespread in use primarily because of advances including shorter incubation times (30-60 minutes) and more applications, including acne and cosmetic skin rejuvenation.
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