Use of nanodispersions in cosmetic end formulations

A method of preparing a cosmetic formulation of a lipophilic cosmetic active agent in the form of an aqueous nanodispersion, which steps consist essentially of

• (α) mixing the components
• (a) 0.1 to 30% by weight of a phospholipid,
• (b) 1 to 50% by weight of a polyoxyethylene coemulsifier selected from the group consisting of polyethoxylated fatty alcohols, polyethoxylated fatty acids, polyethoxylated vitamin E derivatives, polyethoxylated lanolin and derivatives thereof, polyethoxylated fatty acid partial glycerides, polyethoxylated alkylphenols, polyethoxylated fatty alcohols and salts thereof, polyethoxylated fatty amines and fatty acid amides and polyethoxylated carbohydrates,
• (c) 0.1 to 80% by weight of a lipophilic component which is a natural or synthetic or a partially synthetic C4-C18triglyceride and a lipophilic cosmetically active agent, in which any cosmetically active agent is lipophilic and is always present in component (c), and
• (d) 7.40 to 14.2% by weight of ethanol,
• with conventional stirring apparatus until a homogeneous clear liquid is obtained, and
• (β) adding the liquid obtained in step (α) to a water phase, wherein step (β) is carried out in the absence of high shear or cavitation forces, and wherein the particles in the nanodispersion have an average diameter of <50 nm.