Light treatments of sebaceous gland disorders with 5-aminolevulinic acid and photodynamic therapy are disclosed. A preferred treatment includes topical application of 5-aminolevulinic acid to the skin followed by light exposures with repeated treatment at various intervals. At low doses of ALA and photodynamic...http://www.google.com.au/patents/US6897238?utm_source=gb-gplus-sharePatent US6897238 - Topical aminolevulinic acid-photodynamic therapy for the treatment of acne vulgaris
