Topical photodynamic therapy (PDT) which employs 5-aminolevulinic acid (ALA) introduced by Kennedy et al. [1] received approval from the US Food and Drug Administration for the treatment of ...

One notable method is 5-Aminolevulinic acid photodynamic therapy (ALA-PDT), which has been shown to be effective for moderate to severe acne, especially in patients who cannot tolerate traditional ...