Eating mushrooms can alleviate malnutrition. Mushrooms are high in protein, fiber, vitamins, minerals, amino acids and low in fat and carbohydrates. Mushrooms have more protein than vegetables and fruits. It is an excellent remedy for anemia as it is rich in nutrients like folic acid, iron, calcium and phosphorus. Mushrooms are high in fiber, which can cause constipation and stomach upset. Protecting the heart.