The invention relates to the processing of substances that are not soluble, or soluble with difficulty, in water, in such a manner that, introduced into water or oil, these substances can yield a clear solution and can be easily integrated with finest homogeneous distribution into foodstuff, cosmetics, pharmaceuticals, and nutrient solutions. To achieve that, the invention provides a concentrate, consisting of an active substance from the group, which includes an algae oil, an essential oil, a terpene, phosphatidylserine, an ω 3 fatty acid, lanolin, a linoleic acid triglyceride, citral or tea tree oil, and a surplus amount of a polysorbate with at least two and half times the weight of the active substance.