Blue Light Therapy in Dermatological Practice: A Review

Blue light therapy, using wavelengths of 400–500 nm, is a non-invasive treatment gaining popularity in dermatology for conditions like acne, psoriasis, atopic dermatitis, vitiligo, and androgenetic alopecia. It works by generating reactive oxygen species to combat pathogens and has anti-inflammatory effects that reduce cytokine production. Blue light also stimulates hair growth and repigmentation in vitiligo. Advancements in LED technology have improved treatment delivery, but standardized protocols and long-term safety studies are needed. Despite its minimal side effects, further research is required to fully integrate blue light therapy into dermatological practice.