Beschrieben wird ein Detergens, insbesondere Waschmittel, Reinigungsmittel oder Kosmetikum, enthaltend- Waschnuss-Tensid und- Molke und/oder Permeat.Detergent, preferably washing agent, cleaning agent or cosmetic agent comprises soap-nut surfactant, whey and/or permeate. Independent claims are also included for: (1) a two-component detergent-set, comprising soap nut component and whey or permeate component; and (2) preparing a detergent, preferably washing agent, cleaning agent or cosmetic agent, comprising extracting soapnuts with water, whey or permeate to obtain soapnut surfactants, drying and optionally mixing with whey or permeate.