The delicious, slightly nutty flavored soybean has been cultivated in all over. Soybeans are high in protein and a decent source of both carbs and fat. They are a rich source of various vitamins, minerals, and beneficial plant compounds, such as isoflavones. The healthy amount of fiber present in soybeans can actually help in keeping you satiated for a longer duration of time, which further promotes weight loss. Soy protein also supports normal blood cholesterol levels and is a good choice of high-quality, plant-based protein for those wanting to increase muscle mass. Soybeans are composed of protein and also contain good amounts of fat and carbs. 100 grams of boiled soybean.