2B Bio Hydra White 50ml Retail By 2B Bio Beauty Please log in for pricing. Please log in for pricing. The Purpose The alpha-MSH (or melanotropin) controls the activity of the tyrosinase, the synthesis of the melanins (eumelanins and phaeomelanins), as well as the transfer of the melanosomes. As an antagonist of the alpha-MSH, the lightening ingredient of... Add to Wish List