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If you look on the shelves of your health food store or supermarket in search of soy protein products, you'll see everything from veggie burgers to food bars to powdered soy protein beverages. However, not all soy protein products contain the same amount of protein. The following list ranks some popular products from greatest amount of soy protein to lowest:
- Soy protein isolate (added to many soy food products, such as soy sausage patties or soybean burgers)
- Soy flour
- Whole soybeans
- Tofu
The best way to find out about protein content is to look on the product's Nutrition Facts label to see the percentage of soy protein. Also look at the list of ingredients: if a product contains isolated soy protein (or soy protein isolate), the protein content should be fairly high. When the FDA-approved health claim is made, the label will also indicate how many grams of soy protein are in one serving of that product.
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Note: There's a difference between soy supplements (commonly sold in tablets or capsules) and soy protein products. Soy supplements are generally composed of concentrated soy isoflavones. While soy isoflavones may be helpful in treating symptoms of menopause (isoflavones behave similarly to estrogen), there is not enough evidence to support using soy isoflavones for any of the other health benefits mentioned above, like lowering cholesterol.
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