Nutrition constitutes a crucial part of the life cycle. Optimal nutritional intakes can stimulate physiological, cognitive, and psychological development children experience since their early childhood. Establishing healthy eating practices during childhood may also reduce the risk of developing inappropriate eating behaviors after children enter adulthood. As growth patterns change, children’s nutritional needs do not remain consistent at different ages. Improper nutritional intake may hinder children’s growth and negatively impact their health in the long run. This chapter aims to emphasize the role of various nutrients in children’s growth through an in-depth look at nutritional needs at different stages. It will cover macronutrients and micronutrients essential for good health.