The present invention pertains to a composition that contains components (A) and (B) and is capable of suppressing off-flavors of foods and beverages over a wide range. (A) At least one γ-glutamyl peptide selected from the group consisting of a compound represented by general formula (I): γ-Glu-X-Gly (wherein X represents an amino acid residue or an amino acid derivative residue) and a compound represented by general formula (II): γ-Glu-Y (wherein Y represents an amino acid residue or an amino acid derivative residue) or a salt thereof. (B) At least one selected from the group consisting of citronellal, limonene, 2-methylpyrazine, butanoic acid, methylanthranilate and nootkatone.