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Laennec (2ml*50amps) Human Placenta  Whitening Anti-Aging Repair Laennec Placenta    Placenta competitively inhibits melanin synthesis in the reaction of tyrosinase and L-DOPA by interrupting L-DOPAs ability to bind to tyrosinase during melanin synthesis. These results indicate that placenta inhibits the synthesis and agglutination of melanin by interrupting the function of L-D

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