Types of spinach Gives strength and stamina to the body. It is high in iron. Increases masculinity. Reducing constipation. Spinach is more nutritious than mashed potatoes and can prevent wastage of nutrients. Boys and girls can also chop small onions into powder, add cumin, green chillies, a couple of cloves of garlic and fry in oil. But any spinach should have a cooking time of only 3 to 5 minutes. If it is cooked for more than that then there is no benefit in eating the spinach after its nutrients are spoiled.