Soy protein isolate

Soy protein isolate is a highly purified form of soy protein, typically containing 90% or more protein by weight. It is produced from defatted soybean flakes through a process that removes most of the fat and carbohydrates. The resulting powder is then often processed further to create different textures and functionalities.

Manufacturers add soy protein isolate primarily for its high protein content and functional properties, such as emulsification and water-binding. It is commonly used in protein bars, meat alternatives, baked goods, and dairy-free products to boost protein levels and improve texture. It can also be found in some dairy products as a partial replacement for milk proteins.

Soy protein isolate is not considered a food additive in the UK and does not have an E-number. It is a source of protein, which is an essential nutrient. The UK's Eatwell Guide recommends including protein from various sources in the diet. Regulatory bodies like EFSA have evaluated soy protein and its components. While research into soy protein's health effects is ongoing, typical intakes as part of a balanced diet are generally considered safe.