| abstract |
It is an object of the present invention to provide a novel whitening agent and tyrosinase inhibitor that exhibit excellent effects. Conventionally, colloidal gold has been used as a red-purple colorant. The present inventors have clarified that this gold colloid strongly inhibits the activity of tyrosinase, which is a key enzyme in melanin synthesis causing pigmentation, and brings about a strong whitening action, and a whitening agent and tyrosinase containing gold colloid The problem has been solved by providing an inhibitor. According to the present invention, a whitening agent exhibiting excellent effects can be provided by blending this gold colloid with a skin external preparation, food, quasi-drug, or pharmaceutical product. [Selection figure] None |