Used primarily in medical and dermatological fields, it serves as a precursor in the biosynthesis of heme, making it valuable in photodynamic therapy (PDT). In PDT, it is applied topically to treat actinic keratosis and basal cell carcinoma, where it accumulates in abnormal cells and, upon exposure to light, produces reactive oxygen species that destroy targeted cells. Additionally, it aids in the visualization of cancerous tissues during fluorescence-guided surgery, enhancing the precision of tumor removal. Its role in promoting cellular differentiation and apoptosis further supports its therapeutic applications.