The invention relates to aqueous suspensions containing a) at least one poorly water-soluble or water-insoluble active ingredient, b₁) a milk serum protein and/or b₂) a milk serum protein hydrolysate, and c) a saccharose fatty acid ester having an HLB value of between 10 and 18. The invention also relates to methods for producing the suspensions and powder derived therefrom. The suspensions and the powder can be used as additives in food, food supplements, animal fodder, and pharmaceutical and cosmetic preparations.

Aqueous suspensions comprising: (a) at least one sparingly water-soluble or water-insoluble active agent in the form of nanoparticulate particles; (b) at least one whey component selected from the group consisting of whey proteins, whey protein hydrolysates, and mixtures thereof; and (c) at least one sucrose fatty acid ester having an HLB value of 10 to 18; processes for preparing such aqueous suspensions; powders and oil-miscible compositions prepared therefrom and uses therefore.