酸奶里含着钙质、蛋白质和益生菌，常被说成是帮人调理身体的好东西。不过西班牙有研究提了个不同看法，说吃酸奶和健康变好没多大关系。
They found out drinking yogurt daily didn't really improve quality of life or disease resistance compared to those who didn't drink much. 以前也有研究指出，肠道里的细菌对身心都有好处，但具体是哪些细菌有益健康，酸奶里是不是也含有这些，大家其实还不太清楚。