Efficacy and safety of intradermal botulinum toxin A for post-acne erythema: a split-face randomized controlled trial.

Front Med (Lausanne) · 2025 · PMC12665604 · PMID 41333784

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Skin physiological index Compared to baseline, both groups exhibited a decreasing trend in melanin content, EI, TEWL, and sebum secretion, alongside an increasing trend in skin hydration ( Figures 2A – E ).

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