PROBLEM TO BE SOLVED: To provide a composition containing a tea extract or catechin and a citrus extract or flavanone or a glycoside thereof. A composition containing a tea extract or catechin and a citrus extract or flavanone or a glycoside thereof, and a functional food containing the composition. [Effect] The composition of the present invention is useful as a functional food for the purpose of anti-cancer action, anti-muscular atrophy action, anti-obesity action and the like. [Selection diagram] None【課題】茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体とを含む、組成物の提供。【解決手段】茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体とを含む、組成物、及び当該組成物を含む機能性食品。【効果】本発明の組成物は、抗がん作用、抗筋萎縮作用、抗肥満作用等を目的とした機能性食品等として有用である。【選択図】なし