Yogurt "and" Yogurt "are two different concepts. In terms of ingredients, "sour milk" is made of pure milk by fermentation, which belongs to the category of pure milk. Its protein content is ≥ 2.9%, and the protein content of flavored sour milk is ≥ 2.3%. Yogurt contains only 1/3 fresh milk, with water, sweetener and fruity agent. Therefore, the content of protein is less than 1%, and its nutritional value is not the same as yogurt, so it can't be used to replace milk or yogurt at all.