The invention relates to the use of N -methyl- N -acylglucamines as cold stabilizers in aqueous surfactant solutions , wherein at least 90 wt.- % of the N- methyl- N- acylglucamines have a Cs- acyl or Cio- acyl group. The invention further relates to compositions containing (a) N- methyl -N -acylglucamines , wherein at least 90 wt.- % of the N -methyl- N -acylglucamines have a Cacyl or Cio- acyl group as component (A), (b) one or more anionic surfactants as component (B), (c) one or more betaine surfactants as component (C) , (d) optionally additional surfactants as component (D) , (e) water as component (E), and (f) optionally additional additives as component (F).
