A hair treatment medium including diesters of propylene glycol and protein hydrolysates in the absence of arylated silicones includes at least one diester of the propylene glycol according to the formula (I), in which R1 and R2 denote, independently of one another, a residue selected from at least one linear, saturated or unsaturated, branched, saturated or unsaturated and cyclical saturated or unsaturated C6 to C30 hydrocarbon residue and/or a phenyl or benzyl residue substituted with C1 to C4 alkyl groups and/or hydroxy groups, and the compounds thereof in an overall volume of 0.01 to 5.0% by weight, at least one protein hydrolysate and compounds of protein hydrolysates in an overall volume of 0.01 to 10.0% by weight, and at least one C1-C6 alcohol in an overall volume of 1.0% by weight to 40.0% by weight.
