Soy protein isolate and hydrolyzed protein are different. Soy protein hydrolyzed protein powder uses soy protein as the raw material. After biological enzymolysis, the protein is decomposed into various amino acids. After filtering out the acidic insolubles, the decomposition liquid is deodorized and decolorized. The hydrolyzed protein undiluted solution is prepared after PH adjustment and spray drying process. Soy protein is a full-price protein food additive produced from low-temperature desolubilized soybean meal. The protein content of soy protein isolate is more than 90%, and there are nearly 20 kinds of amino acids, and it contains essential amino acids for human body.