Soy protein concentrate is made by removing a portion of the carbohydrates (sugars) from dehulled and defatted soybeans. Normally, about 750 kilograms of soybean protein concentrate can be obtained from one metric ton of defatted soybean flakes. There are different soy protein production methods. The most frequent method used is alcohol extraction although this method results in most loss of the soy isoflavones. However, when the water extraction method is used to remove the sugars, there is a good retention of the isoflavones in the final product. Soy protein concentrate retains most of the fiber of the original soybean. Soy protein concentrate is very digestible and therefore suited for children, pregnant and lactating women and elderly. It is in pet foods and milk replacers for calves and pigs.