For a healthy child, the best foundation for growth and brain development is a balanced diet, not medicines. Focus on nutrient-rich foods: milk and dairy for calcium; eggs, lean meats, and leafy greens for iron; and fish or seeds for Omega-3 fatty acids (DHA) to support brain health. Adequate sleep and active play are also vital. Please do not start any over-the-counter vitamins or supplements without consulting her pediatrician. A doctor can review her growth charts and prescribe specific supplements, like Vitamin D or iron, only if a deficiency is actually present.