in Food
Soy protein isolate is a full-value protein food additive produced from low-temperature defatted soybean meal. It is a key plant protein product, rich in nutrients and cholesterol-free, and is one of the few plant proteins that can serve as an alternative to animal proteins. With a protein content exceeding 90% and a digestibility rate of 93–97%, it has been widely applied in the food industry and beyond.
Soy protein isolate contains eight essential amino acids required by the human body, with certain amino acids exceeding FAO/WHO standards. It is primarily composed of 11S and 7S globulins, and its amino acid profile is well-balanced, with lysine being the most abundant. It also contains essential fatty acids, phospholipids, calcium, phosphorus, and other minerals, offering functional benefits superior to meat proteins. When blended with other foods, it significantly enhances their nutritional value.
in Meat Products
In minced meat products such as patties, meatballs, dumplings, buns, and shumai, soy protein isolate is added due to its excellent water- and oil-binding properties. It improves texture, reduces fat release, enhances juiciness, prevents shrinkage during cooking, increases yield, reduces costs, and boosts nutritional value. In whole-muscle products such as ham and corned beef, it is added during brine curing to improve water retention, gelation, and overall texture while stabilizing yield. Soy protein isolate is also used in the production of simulated meat products, providing meat-like flavor and texture with high protein, low fat, and no cholesterol.
in Baked Goods
Adding up to 5% soy protein isolate in bread increases loaf volume, improves crust color, enhances sensory quality and nutritional value, and prolongs shelf life. In cakes, it improves emulsification and foam stability; in cookies, it enhances water retention, prevents moisture loss, improves texture and appearance, shortens mixing time, and increases shelf life.
in Dairy Products
Soy protein isolate is increasingly used in special formula milk powders, combining plant and animal proteins. Due to its similar isoelectric point to milk proteins, it is feasible to produce composite yogurts. Fermented dairy beverages made with soy protein and milk closely resemble traditional yogurt in flavor and texture while providing a balanced nutritional profile.
in Canned Foods
Soy protein, also known as textured vegetable protein (TVP), contains over 50% protein and all eight essential amino acids. When processed into canned plant-based meat, it becomes a high-protein, portable, and convenient food product with high nutritional value.
