There are proposed substance mixtures comprising(a) 20 to 80% by weight of monocyclic terpenes and(b) 80 to 20% by weight of active substances selected from the group consisting of rebaudiosides or plant extracts comprising them, steviosides or plant extracts comprising them, naringin dihydrochalcone, mogrosides or plant extracts comprising them, rubusosides or plant extracts comprising them.