Hair treatment agents with a pH between 3.5 and 5.5 includea) 0.00001 to 20% by weight at least one proteolipid of the formula (I)R′—X—R″ (I),wherein R′ stands for a straight-chain or branched, saturated or unsaturated hydrocarbon group having 11 to 24 carbon atoms,R″ denotes a protein, a peptide, or a protein hydrolysate,X stands for —C(O)O— or —N+(RIII2)—RIV— or —N(RIII)RIV— or —C(O)—N(RV)RVI—,RIII denotes —(CH2)x—CH3 with x=0-22,RIV denotes —CH2—CH(OH)—CH2— or —(CH2)x— with x=0-22, andRV and RVI independently of one another stand for —H or —(CH2)x—CH3 with x=0-22,with the proviso that R″ stands for keratin or a keratin hydrolysate, when X stands for —C(O)O—, andb) 0.01 to 5.0% by weight, based on the total weight of the hair treatment agent, of magnesium citrate in a water-containing carrier.
