promotes growth, aids in vision, healthy hair, skin, and mucous membranes, increases resistance to infection; sources include liver, spinach, green leafy and yellow vegetables, fruits, egg yolk, butter, cream, milk promotes muscle tone, nerve function, digestion, appetite, normal elimination, utilization of carbohydrates; sources include pork, liver, and other organ meats, breads and cereals, potatoes, peas, beans, and soybeans promotes protein, fat, and carbohydrate metabolism, functioning of the nervous system, appetite, functioning of the digestive system; sources include meat, poultry, fish, peanut butter, breads, cereals, peas and beans, eggs, and liver promotes formation of substances that hold tissues together, healthy blood vessels, skin, gums, bones, and teeth, wound healing, prevention of bleeding and resistance to infection; sources include citrus fruits, tomatoes, potatoes, cabbage, strawberries, green vegetables, and melons