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Effect of an Oral Formulation on Skin Lightening: Results from In Vitro Tyrosinase Inhibition to a Double Blind Randomized Placebo Controlled Clinical Study in Healthy Asian Participants The efficacy of a novel tomato extracts formulation on skin aging and pigmentation: A randomized, double blind, parallel controlled trial ScienceDirect Glutathione as a skinlightening agent and in melasma: a systematic review Sarkar 2025 International Journal of Dermatology Wiley Online Library The Effect of Cysteine Peptide Ingestion on Skin Brightness, a Randomized, Double Blind, Placebo Controlled, Parallel Group Human Clinical Trial

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