Method for producing solid dispersion containing hardly soluble polyphenol

A method of producing a solid dispersion containing an amorphous hardly soluble polyphenol, comprising the steps of:

• mixing (A) a polyphenol having a solubility in water at 25° C. of 5 g/L or less, wherein said polyphenol is ellagic acid, (B) pectin, and (C) at least one selected from the group consisting of maltose, fructose, and glucose,
• wherein the content of the component (A) in the mixture is from 5 mass % to 75 mass %, the content of the component (B) in the mixture is from 5 mass % to 80 mass %, and the content of the component (C) in the mixture is from 5 mass % to 85 mass %, and a mass ratio of the component (A) to a total of the component (B) and the component (C), [(A)/{(B)+(C)}], is from 0.17 to 0.47,
• followed by
• melting of the mixture by heating at a temperature of from 75° C. to 250° C.;
• and
• solidifying the molten product by cooling to provide said solid dispersion.