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.
