How to rate soy protein isolate

As we all know, protein is an important type of nutrient. Its existence is closely related to various activities of life, such as participating in the composition and metabolism of the body, participating in the composition and metabolism of genetic information, and also providing heat to the body.

In the past, whenever protein powder was mentioned, people often thought of animal-derived protein first, followed by plant-based proteins such as soy protein. Some people even arbitrarily believe that protein from plant sources cannot compete with protein from animal sources. But now on the market, soy protein is the protein "star" widely used by people.

The "top student" in plant protein

To evaluate whether a protein is "high-quality", it mainly depends on whether its "amino acid pattern" is good and whether its "amino acid score" is high. If the amino acid ratio in the food is close to the amino acid composition ratio in the human body, it means that the amino acid pattern is good and the amino acid score is high, which means that it is highly utilized after entering the human body. In this regard, soy protein isolate is undoubtedly the "top student" among plant proteins.

According to the protein quality assessment method proposed by the joint expert assessment team of the Food and Agriculture Organization of the United Nations and the World Health Organization, the protein digestibility corrected amino acid score (PDCAAS) is calculated, and the essential amino acid requirements of children aged 2-5 years are used as the benchmark to calculate the available amino acids in food. By comparison, soy protein isolate has a PDCAAS of 1 and beef has a PDCAAS of 0.92 (out of 1). In addition, the protein content of soy protein isolate is as high as 90%, and it is rich in 8 essential amino acids. Soy protein is the only high-quality protein among plant proteins. Therefore, it is not an exaggeration to say that soy protein is the "top student" among plant proteins.


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