Method for producing melanin synthesis promoting substance, melanin synthesis promoting substance, external preparation for skin, method for producing tyrosinase active substance, tyrosinase active substance, and pharmaceutical
Disclosed is a novel technique by which melanin synthesis can be enhanced. Specifically disclosed is a method for producing a melanin synthesis enhancer. One embodiment of the method comprises: a drying/pulverization step (S100) in which plant tissues of stevia serving as a starting material are dried and pulverized； a fermentation step (S102) in which the dried stevia powder obtained in the drying/pulverization step (S100) is fermented； an extraction step (S104) in which extraction from the fermented stevia powder (hereinafter referred to as "fermented stevia") is carried out using an aqueous ethanol solution, thereby obtaining a liquid extract； a first fractionation step (S106) in which the liquid extract of the fermented stevia is fractionated, thereby obtaining an ethanol-soluble fraction； and a second fractionation step (S108) in which the ethanol-soluble fraction is further fractionated, thereby obtaining a lipid-soluble fraction.
