To provide a powder beverage or a liquid beverage hardly generating color tone change or deterioration of flavor, and having enhanced polyphenol, even when stored for long time in a range from weak acid of pH of 5 or more to a neutral with a reduced state.SOLUTION: There is provided a liquid beverage containing following components (A) to (C)； (A) tannin, (B) chlorogenic acids of 0.1 to 0.5 mass% and (C) protein, and having mass ratio of the component (A) and the component (B) [(A)/(B)] of 0.7 to 3.0, mass ratio of the component (C) and the component (B) [(C)/(B)] of 0.05 to 0.23, and pH of 5.0 to 7.0.SELECTED DRAWING: None【課題】還元した状態でｐＨ５以上の弱酸性から中性の領域において長時間保管しても、色調変化や風味の低下が生じ難い、ポリフェノールが強化された粉末飲料又は液体飲料を提供すること。【解決手段】次の成分（Ａ）～（Ｃ）；（Ａ）タンニン（Ｂ）クロロゲン酸類 ０．１～０．５質量％、及び（Ｃ）たんぱく質を含有し、 成分(Ａ)と成分 (Ｂ)との質量比[（Ａ）／（Ｂ）]が０．７～３．０であり、 成分(Ｃ)と成分 (Ｂ)との質量比[（Ｃ）／（Ｂ）]が０．０５～０．２３であり、かつｐＨが５．０～７．０である、液体飲料。【選択図】なし
