Specific eatable taste modifiers

A composition comprising an eatable having a bitter and/or metallic taste and at least one tastand in a substantially tasteless amount of about 0.0000001 to about 300% by weight, based on the weight of the eatable, which amount is sufficient to reduce said bitter and/or metallic taste without substantially reducing sweetness, said tastand being selected from the group consisting of compounds which are substantially tasteless in the amount used and having the structure:

• ##STR97## wherein at least one of the substituents R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 is selected from the group consisting of substituents capable of participating in a hydrogen bond and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are independently selected from the group consisting of H, hydroxy, nitro, cyano, halogen, trifluoroacetyl, SO.sub.3 H, CH.sub.2 SO.sub.2 NH.sub.2, COOH and an acid group of the structure ZO.sub.q H.sub.r wherein Z is an element selected from the group consisting of carbon, sulfur, boron or phosphorus, q is an integer from 2 to 3 and r is an integer from 1 to 3;
• and the following groups which may be substituted or unsubstituted:
• alkyl, alkoxy, aryl, alkylene, aminoacyl, aryloxy, amino, aralkoxy, acyl, arylacyl, benzoyl, alkylamino, dialkylamino, trialkylamino, carbonates, alkylcarbonates, arylcarbonates, acylamino, guanidino, alkylguanidino, acylguanidino, arylguanidino, alkylurethanes, arylurethanes, ureas, alkylureas, an O, S, N or phosphorylated glycoside, where the glycoside is selected from the group consisting of a monosaccharide, a disaccharide, a trisaccharide and an oligosaccharide;
• CHO, COCH.sub.3, CH.sub.2 CHO, CH.sub.2 COOH, COOCH.sub.3, OCOCH.sub.3, CONH.sub.2, NHCHO, SCH.sub.3, SCH.sub.2 CH.sub.3, CH.sub.2 SCH.sub.3, SO.sub.2 NH.sub.2, SO.sub.2 CH.sub.3, CH.sub.2 SO.sub.3 H, cycloalkyl, heterocyclic, polycyclic, arylureas, carboxylic acid ester, carboxamide, N-alkyl carboxamide, di-alkyl carboxamides, and/or two substituents taken together represent an aliphatic chain linked to a phenyl ring at one or more positions to form a ring structure, either directly via a carbon atom or indirectly via an oxygen, nitrogen or sulfur atom;
• and physiologically acceptable salts of all of the foregoing.