ACTIVE INGREDIENT-CONTAINING PARTICLES, FORMULATIONS, TOPICAL AGENTS, COSMETICS, AND INJECTIONS

Japanese Patent JP2018070535

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PROBLEM TO BE SOLVED: To provide active ingredient-containing particles which are excellent in the in vivo absorption properties of an active ingredient.SOLUTION: The present invention provides an active ingredient-containing particle having a particle body containing an active ingredient, and a coating layer which coats at least one portion of the surface of the particle body and contains a surfactant, the particle body being a solid, and the affinity index X represented by the following formula (1) ranging in 0.05