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glutathione injection skin whitening evidence safety A 2025 systematic review published in the International Journal of Dermatology evaluated human studies on for melasma and pigmentation published over the past decade. Researchers screened trials from PubMed, Embase Size:7 (41+ lbs) topical ghk-cu vs injectable glutathione-cleansing-soap

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, Chaumontet C., Heberden C., Martel P., and Gaillard‐Sanchez I