I love corn, it's one of the only vegetables my kids will eat. Corn (Sweetcorn) Diet Nutrition & Corn: Corn contains beta-carotene, small amounts of B vitamins and vitamin C. It is a useful source of protein and is rich in fiber. Canned corn is less nutritious, higher in calories and usually much higher in added sodium. Calories in Corn: 1 x 5" ear = 65 calories 1 cup cooked = 170