Photodynamic Therapy (PDT) is a treatment in which Levulan® (5-aminolevulinic acid or ALA) is applied to the skin.  It is subsequently "activated" by specific wavelengths of light, either the Intense Pulsed Light treatment (IPL), the BLU-U Light, or both.  The use of Levulan dramatically increases the outcome of Photofacial treatments.  A consultation is required prior to treatment in order to determine which procedure would be most beneficial for you.