Do you really know soy protein isolate?
Abstract: Whether it is a “big jar” protein powder for muscle gain, or a “small piece” protein powder for immune enhancement. In the past, as long as protein powder was mentioned, people often thought of animal-derived protein first, followed by vegetable protein such as soy protein. It is even more arbitrary that plant-derived protein cannot be compared with animal-derived protein. However, in the market, the increasing number of protein powders with soy protein isolate as the main raw material also shows an indisputable fact. Plant protein is attracting more and more protein powder manufacturers’ attention? In view of this, the editor has to ask, do you really know soy protein isolate?
Keywords: Soy protein isolate, amino acid, plant protein
“Excellent students” in plant protein
Evaluating whether a protein is “high-quality” mainly depends on whether its “amino acid profile” is good and whether its “amino acid score” is high. If the ratio of amino acids in the food is close to the composition ratio of amino acids in the human body, it means that the amino acid pattern is good and the amino acid score is high, which means that it has a high utilization rate after entering the human body. In this regard, soy protein isolate is undoubtedly the “superior student” in plant protein.
PDCAAS (Protein Digestibility Corrected Amino Acids Score), the amino acid score after correction of protein digestibility, is a protein quality evaluation method proposed by the Joint Expert Evaluation Group of the Food and Agriculture Organization of the United Nations and the World Health Organization. Based on the essential amino acid requirements of children aged 2-5 years, compare the content of essential amino acids that can be used in food. The full score is 1, which is 100%. Those with a score of 1, indicate that the protein is a high-quality protein. According to this scoring benchmark, the PDCAAS of soy protein isolate is 1, and the PDCAAS of beef is 0.92.
It doesn’t matter if you are confused about this series of explanations. Simply put, if the perfect score for high-quality protein is 100 points, soy protein isolate gets a perfect score and beef scores 92 points. In fact, the protein content of soy protein isolate is as high as 90%, and it is rich in 8 kinds of essential amino acids. You know, soy protein is the only high-quality protein among plant proteins. Therefore, it is not an exaggeration to say that soy protein is a “best student” in plant protein.
A new and affordable option
In the past, as the main raw material of protein powder, whey protein has always occupied a “dominant” position. However, as people gradually deepen their understanding of the nutritional value of soy protein isolate, protein powders with soy protein isolate as the main raw material have gradually attracted attention. High nutrition is one aspect of its affirmation. On the other hand, better economy and higher safety also make it a new hot spot in the application field of protein powder.
As we all know, the whey powder used as the raw material of protein powder is a by-product of cheese production, and my country’s cheese has not been produced on a large scale. Therefore, as the world’s largest importer of whey powder, the status quo of long-term dependence on imports for whey powder must be To a certain extent, the price of domestic whey protein powder has been affected. However, soybeans are planted widely in my country, and soybean protein isolate is more economical. And compared with animal-derived protein, the safety of its raw material sources is easier to control. Take the soybean protein isolate produced by Yihai Kerry (Qinhuangdao) Protein Industry Co., Ltd. as an example. In order to ensure the safety of the final product, not only non-GMO soybeans are used as raw materials, but also low nitrite content and low microbial index control are achieved. Low moisture control; and through advanced biotechnology, effectively improve the digestion and absorption rate of protein; and passed the Kosher, Halal, ISO22000, IP-SGS and international leading AIB certification.
Special love for special you
Compared with animal-derived protein, another significant advantage of soy protein isolate is low fat and zero cholesterol, which makes it more suitable for the elderly and specific consumer groups with the aforementioned health concerns. For vegetarians, protein powder with soy protein isolate as the main raw material is undoubtedly the best choice. In addition, the digestion and absorption rate of soy protein isolate is as high as 90%, making it especially suitable for people who are physically weak, such as those who recover after surgery, the elderly, infants and young children.
It is worth mentioning that in recent years, the use of soy protein isolate as a base material instead of whey powder as a formula powder for infants and young children has also continued to introduce new trends. In addition to nutrient richness, lactose-free and hypoallergenic properties are also important reasons why it is favored by manufacturers.
Because soy protein isolate does not contain lactose, it is safe for infants with galactosemia or lack of lactase; at the same time, lactose-free formula can also help infants recover from diarrhea caused by transient lactase deficiency. Regarding allergenicity, foreign researchers have compared healthy infants fed breast milk, milk formula or soy protein-based formula milk powder, and found that 0.5% of infants fed soy protein-based formula milk powder had allergic reactions, while those who were fed milk powder had allergic reactions. The base formula milk powder accounted for 1.8%.
How about it, do you now have a more comprehensive understanding of soy protein isolate? The so-called “every flower is in each eye, why ask the other person” is the way to win by choosing the right protein according to your own product needs. The rational use of proteins from different sources to produce differentiated products for sub-populations will become the development trend of protein products in the future.