Photodynamic therapy (PDT) involves the use of Blu-U blue light to activate a photosensitizer (Levulan, ALA). The Levulan topical solution is applied and then absorbed by the AK cells where it is converted to a chemical that makes the cells sensitive to light. Exposure to the Blu-U light causes reactions that destroy the AK cells. PRP aids in the body’s natural repair process and contains Growth Factors known to boost the growth of hair follicle stem cells and revitalize the hair root foundation to grow a thicker and healthier head of hair.