Soybeans are known for their offering of protein to the human body. 1 cup of soybeans can fill up your DV protein requirement. But soybeans also happen to be super rich in minerals such as manganese (71% of DV), copper (78% of DV), iron (49% of DV) and phosphorus (60% of DV). Over a quarter of this nutritious food is comprised of Vitamin K, riboflavin, potassium and magnesium. The downside of taking this food is the quick addition of calories to your body, which is why you should not consume more than a cup. Mix them into your salad or eat them in the snack form to boost your nutrient intake.