Abstract: Poor and inadequate nutrition during early childhood is a major determinant of both immediate and long-term health outcomes. Early childhood is a critical period for growth and development, and nutrition plays a pivotal role in shaping physical, cognitive, and emotional well-being. Inadequate nutrition during this period can lead to a range of adverse effects, including stunted growth, developmental delays, weakened immune systems, and an increased susceptibility to chronic diseases later in life. This paper explores the various ways in which poor nutrition impacts young children, focusing on the effects of malnutrition, micronutrient deficiencies, and imbalanced diets. The long-term consequences, both for the individual child and for society, are also discussed. Finally, the paper highlights the importance of early intervention, proper dietary guidelines, and public health policies aimed at improving child nutrition worldwide.