The American Academy of Pediatrics, the U.S. Department of Agriculture, and the World Health Organization recommend the introduction of complementary foods to infants by 6 months of age. At that age, the infant’s needs for several nutrients, including iron, zinc, and calcium, can no longer be met with breast milk alone. Beef as a First Food explores the infant’s nutritional requirements and explains how beef provides infants with the iron and zinc needed for optimal cognitive and physical development.