Blue Light Therapy in Dermatological Practice: A Review

    February 2025 in “ Cosmetics ”
    Giuseppe Lodi, Fortunato Cassalia, M. Sannino, Giovanni Cannarozzo, Adone Baroni, S. Amato, Elena Zappia, Giovanni Pellacani, Steven Paul Nisticò
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    TLDR Blue light therapy is promising for skin and hair conditions but needs more research for widespread use.
    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.
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