Brussels sprouts
Too often associated with childhood dinner-table standoffs, these cruciferous vegetables feature sulfur compounds called glucosinolates, shown to help lower your risk for several types of cancer, according to research from Oregon State University. Loaded with iron and potassium, a cup of Brussels sprouts also features 54 mcg of folate—about 14% of your 400-mcg recommended daily allowance. Slice them in half and sauté them in salt, pepper, and garlic to enliven their natural flavor.