Both cow's milk and toddler formula can be appropriate after age 1, and the choice is largely personal. While cow's milk is accessible, some parents prefer toddler formula for its added fortification (like iron and Vitamin D). If you opt for cow's milk, focus on getting these nutrients from a balanced diet of solids, and aim to source high-quality, hormone-free milk if possible. Consult your pediatrician to see which option best fits your child's specific nutritional needs.