A recent study found Americans are lacking several nutrients vital to maintaining good health and helping prevent serious illness. Are you at risk? Women in particular are lacking calcium for good bone health. You can get it from dark; leafy vegetable; dairy products; and finfish. Fiber is also missing from diets. Get it from vegetables, fruits, legumes, and nuts. Fiber promotes good heart health and cuts your chances of developing diabetes. Magnesium helps you maintain healthy muscle and nerve function, and it helps in bone development. Get yours from bran, nuts, seeds, and fish like halibut. Make sure you get plenty of potassium to help keep blood pressure in check. Good sources include bananas and yogurt.