@CurmudgeonApple Ive used tret for three years , I experienced 0 photosensitivity. If anything people mistake the general irritation from it as irritation from the Sun, when in reality even if they applied it in complete darkness theyd feel the same. Tretinoin actually reverses photoaging and also makes your skin less sensitive to sunlights damaging effects:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9112391/
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