Indigestible fats or fat-like substances, for example esters of aliphatic saturated or unsaturated fatty acids (2 to 22 carbon atoms, in particular 10 to 18 carbon atoms) with monovalent aliphatic alcohols (1 to 20 carbon atoms), carnauba wax, beeswax, fatty alcohols (straight chain or branched) of chain length C8 H17 OH to C30 H61 OH, in particular C12 H25 OH to C24 H49 OH.