Abstract: Agents for the inhibition, suppression, or prevention of overeating include glutamic acid and/or at least one of its salts, as is or in a carrier or base, and have superior safety at a low price and further have a favorable flavor and are suited for long-term use. Such agents will amplify or sustain a sense of fullness and, further, are effective against appetite stimulation that arises regardless of a sense of fullness with respect to foods that are, for example, sweet or delicious, especially for a person who has a drive for thinness.