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Soy Protein Isolate

Soy protein isolate is extracted from defatted soy flour. It is made of almost pure protein, since the isolation process yields a product that is 93 to 97 percent protein, leaving minimal fat and carbohydrates.

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Description

Producers of soy protein isolate, a high-protein supplement that comes in powdered form, promote it as an aid for gaining muscle and improving the body. Soy Protein Isolate: Not So Friendly. Soy processors have worked hard to get these antinutrients out of the finished product, particularly soy protein isolate (SPI) which is the key ingredient in most soy foods that imitate meat and dairy products, including baby formulas and some brands of soy milk.

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