Provided is a low-cost dispersing agent which, for use in protein-containing foods and beverages, is capable of preventing or suppressing coagulation, precipitation and phase separation of protein particles without diminishing the food texture or resulting in coloration, or unusual tastes or smells in the food or beverage also provided is a protein-containing food or beverage. This dispersing agent for protein-containing foods and beverages comprises protein which is dispersed in a protein-containing food or beverage, and is characterized by containing an oxidized starch having a carboxyl group content in the range of 0.4-1.3 mass%. This protein-containing food or beverage is characterized by containing the aforementioned dispersing agent for protein-containing foods or beverages.【課題】低コストで、飲食品に対して着色、異味・異臭及び食感の低下を生じることなく、蛋白質粒子の凝集、沈澱、相分離を防止又は抑制可能な蛋白質含有飲食品用分散剤及びそれを用いた蛋白質含有飲食品を提供する。【解決手段】蛋白質含有飲食品用分散剤は、蛋白質含有飲食品中の蛋白質を分散させる蛋白質含有飲食品用分散剤であって、カルボキシル基含量が0.4~1.3質量%の範囲である酸化澱粉を含むものとし、この蛋白質含有飲食品用分散剤を含む蛋白質含有飲食品。【選択図】なし
