It is intended to provide a food or a drink with a favorable flavor which has an acidic nature, contains protein and minerals, and has been stabilized in dispersion without showing any protein aggregation or the like even in the absence of a stabilizer. It is also intended to provide such an acidic protein food or drink which shows no protein aggregation even in the case of using not only minerals hardly soluble in aqueous media but also highly soluble minerals. By using an acid-soluble soybean protein, it is possible to provide an acidic mineral-containing food or drink which has a high stability without resort to a stabilizer as an essential component. Owing to the acidic nature, moreover, a product having a refreshing flavor, which is never achieved by neutral foods or drinks, can be prepared.本發明提供一種含有礦物質的酸性蛋白飲食品。此發明的課題在於，提供一種酸性且含有蛋白及礦物質，即使不添加穩定劑也不產生蛋白的凝聚，而分散穩定化之風味良好的飲食品。而且，提供一種礦物質並不限定為難溶於水性溶劑的，即使為易溶的也不會產生蛋白質的凝聚之酸性蛋白飲食品。本發明藉由利用酸性可溶大豆蛋白，可提供一種即使含有礦物質類，也不以穩定劑為必須的成分，且穩定性優良之酸性的含有礦物質的蛋白飲食品。而且，因為呈酸性，所以可調製中性的飲食品所不具備的、具有清涼感之風味的飲食品。
