Problem to be solved: to provide an acidic sterilization protein containing food and beverage which does not cause coagulation and precipitation of protein particles even if it is sterilized through a heat sterilization process, and a method for producing food products containing acidic sterilized proteins.Solution containing acidic sterilizing protein containing wurgham and pectin. In addition, it is preferable that the content of the waxy gum contained in the polysaccharide is in the range of 0.01 to 3% by weight, and the viscosity measured at a rotational speed of 60 rpm and 10 ° C. using a B-type rotary viscometer is 10 to 5000 MPa · s.The method of producing an acidic sterilized protein containing food and drink includes the process of preparing a mixture containing a wurgham and pectin in an acidic protein containing food and a heating and sterilizing step for heating the mixture under the condition of an F value of 0.001 or more.Diagram【課題】加熱殺菌工程を経て殺菌されていてもタンパク質の粒子の凝集及び沈殿が生じていない酸性殺菌タンパク質含有飲食品、及び酸性殺菌タンパク質含有飲食品の製造方法提供。【解決手段】ウェランガム及びペクチンを含有する酸性殺菌タンパク質含有飲食品。更に大豆多糖類を含有し、ウェランガムの含有量が0.01~3重量%であり、B型回転粘度計を用いて回転数60rpm、10℃で測定した粘度が10~5000mPa・sであることが好ましい。又、酸性殺菌タンパク質含有飲食品の製造方法は、酸性タンパク質含有飲食品にウェランガム及びペクチンを含有させて混合物を調製する工程と、F値が0.001以上の条件で混合物を加熱する加熱殺菌工程とを含む。【選択図】図1