Use of the substituted, chiral amino alcohols comprising one or more structural units of the following formula in which the abbreviations A, Y and R 1 and R 3 to R 5 have the following meanings: A is a covalent bond or a saturated or unsaturated, straight-chain, branched or ring-containing hydrocarbon group, Y is a covalent bond or a saturated or unsaturated, straight-chain, branched or ring-containing hydrocarbon group, which may have an oxygen atom on one of its ends, through which it is connected to R 1, R 1 is a saturated or unsaturated, straight-chain or branched or ring-containing aliphatic group or a heterocyclic or aromatic group, which in all cases may be substituted or unsubstituted and/or the carbon chain of which can be interrupted by one or more groups B, R 5 is selected from the group consisting of (a) saturated and unsaturated, straight-chain and branched, substituted and unsubstituted aliphatic radicals, wherein individual C atoms may be replaced or substituted by oxygen atoms or carbonyl groups, wherein the carbon chains of these radicals may optionally be interrupted by a group B, and (b) araliphatic, cycloaliphatic, aromatic and heterocyclic, unsubstituted or substituted radicals, the carbon chains of which may be interrupted by one or more groups B and/or by one or more groups D, R 3, R 4 each independently represents hydrogen or an unsubstituted or substituted, straight-chain or branched or ring-containing aliphatic or an unsubstituted or substituted araliphatic substituent, the carbon chain of which may be interrupted by one or more groups B, B is selected from among polymerizable or cross-linkable structural elements of the group composed of C 1 -C 16 -alkenyl, C 1 -C 16 -alkenyloxy, -C≡C-, -CH=CH-COO-, -CH=CH-,-CX=CH-COO- with X = C 1 -C 16 -alkyl and the trans-form of -OOC-CH=CH-COO-. D is selected from -O-, -NH-, -N(CH 3)-, -N(C 2 H 5)-, -SO 2 - -CO-, -COO-, -CH = CH-, -OCOO-, -OCH 2 -, CH=N, -CF 2 CF 2 -, as a chiral dopant, alone or in a mixture with one or more additional amino alcohols with a structural unit of formula or in a mixture with another dopant, in a liquid crystal or a liquid crystal mixture. A is a covalent bond or a saturated or unsaturated, straight-chain, branched or ring-containing hydrocarbon group, Y is a covalent bond or a saturated or unsaturated, straight-chain, branched or ring-containing hydrocarbon group, which may have an oxygen atom on one of its ends, through which it is connected to R 1, R 1 is a saturated or unsaturated, straight-chain or branched or ring-containing aliphatic group or a heterocyclic or aromatic group, which in all cases may be substituted or unsubstituted and/or the carbon chain of which can be interrupted by one or more groups B, R 5 is selected from the group consisting of (a) saturated and unsaturated, straight-chain and branched, substituted and unsubstituted aliphatic radicals, wherein individual C atoms may be replaced or substituted by oxygen atoms or carbonyl groups, wherein the carbon chains of these radicals may optionally be interrupted by a group B, and (b) araliphatic, cycloaliphatic, aromatic and heterocyclic, unsubstituted or substituted radicals, the carbon chains of which may be interrupted by one or more groups B and/or by one or more groups D, (a) saturated and unsaturated, straight-chain and branched, substituted and unsubstituted aliphatic radicals, wherein individual C atoms may be replaced or substituted by oxygen atoms or carbonyl groups, wherein the carbon chains of these radicals may optionally be interrupted by a group B, and (b) araliphatic, cycloaliphatic, aromatic and heterocyclic, unsubstituted or substituted radicals, the carbon chains of which may be interrupted by one or more groups B and/or by one or more groups D, R 3, R 4 each independently represents hydrogen or an unsubstituted or substituted, straight-chain or branched or ring-containing aliphatic or an unsubstituted or substituted araliphatic substituent, the carbon chain of which may be interrupted by one or more groups B, B is selected from among polymerizable or cross-linkable structural elements of the group composed of C 1 -C 16 -alkenyl, C 1 -C 16 -alkenyloxy, -C≡C-, -CH=CH-COO-, -CH=CH-,-CX=CH-COO- with X = C 1 -C 16 -alkyl and the trans-form of -OOC-CH=CH-COO-. D is selected from -O-, -NH-, -N(CH 3)-, -N(C 2 H 5)-, -SO 2 - -CO-, -COO-, -CH = CH-, -OCOO-, -OCH 2 -, CH=N, -CF 2 CF 2 -, as a chiral dopant, alone or in a mixture with one or more additional amino alcohols with a structural unit of formula or in a mixture with another dopant, in a liquid crystal or a liquid crystal mixture.