research Effects of Phototherapy on Refractory Alopecia Areata April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” Phototherapy helps some patients with alopecia areata regrow hair, especially those with hair at treatment start and less severe forms of the condition.
research Photostability and Toxicity of Finasteride, Diclofenac, and Naproxen Under Simulated Sunlight Exposure: Evaluation of the Toxicity Trend and Packaging Photoprotection 13 citations, December 2013 in “Chemistry Central Journal” Sunlight exposure increases drug toxicity; amber glass best for protection.