Oil-in-water emulsions contain green tea extract and multivalent complex ligands which prevent discoloration, useful as pharmaceutical and cosmetic skin care compositions

摘要

Oil-in-water emulsion for cosmetic or pharmaceutical use comprises green tea extract and multivalent complex ligands (I). The emulsion has a pH of 2-6 and an L number of more than 81. Independent claims are also included for the following: (1) use of (I) for delaying or preventing discoloration of an oil-in-water emulsion containing water and green tea extract and having a pH of 2-6; (2) stabilization of the color of an oil-in-water emulsion containing water and green tea extract by: (a) adjusting the pH of the emulsion to 2-6; and (b) adding (I)