This webinar was recorded during the 2025 Virtual Pediatric Conference. It examines evidence-based nutritional requirements critical for neurocognitive and physiological development during the first 36 months of life. We will analyze the essential macronutrients that support this crucial developmental window while also addressing the etiology of selective eating behaviors in early childhood. The session provides clinically validated intervention strategies to effectively manage food aversion and establish healthy dietary patterns during this formative period.