Preparation method of liquid beverage containing alpha lactalbumin and product thereof

The invention relates to a preparation method of a liquid beverage containing alpha lactalbumin and a product thereof, the preparation method comprises the following steps: step S1, inoculating a lactic acid bacteria starter into a whey powder aqueous solution, fermenting to obtain fermentation liquor, and centrifuging to remove precipitate to obtain an intermediate A; mixing an alpha-lactalbumin aqueous solution with organic acid, and carrying out heating treatment to obtain an intermediate B; and S2, mixing the intermediate A and the intermediate B to obtain the liquid beverage containing alpha-lactalbumin. The prepared liquid beverage is clear, transparent, stable, convenient to drink, rich in alpha-lactalbumin, high in nutritional value and health-care value, rich and full in fermented frankincense flavor, harmonious in sour and sweet, fine and smooth in taste and good in flavor. 本发明涉及一种含有α乳白蛋白的液体饮品的制备方法及其产品，所述制备方法包括如下步骤：步骤S1：向乳清粉水溶液中接种乳酸菌发酵剂，进行发酵，得到发酵液，离心去除沉淀，得到中间物A；将α-乳白蛋白水溶液与有机酸混合后，进行加热处理，得到中间物B；步骤S2：将