The present invention relates to the discovery that certain non-naturally occurring, non-peptide amide compounds and amide derivatives, such as oxalamides, ureas, and acrylamides, are useful flavor or taste modifiers, such as a flavoring or flavoring agents and flavor or taste enhancer, more particularly, savory (the “umami” taste of monosodium glutamate) or sweet taste modifiers, savory or sweet flavoring agents and savory or sweet flavor enhancers, for food, beverages, and other comestible or orally administered medicinal products or compositions.