Introduction Acne vulgaris remains a common skin condition worldwide, affecting people across ages and ethnicities. The emergence of drug-resistant strains of Cutibacterium acnes (formerly Propionibacterium acnes) has complicated standard treatments, including antibiotics such as tetracyclines. Antimicrobial photodynamic therapy (aPDT) using dye-based photosensitizers like sodium iron chlorophyllin offers a non-antibiotic strategy to neutralize acne-associated bacteria while…