The absence of disease is only one aspect of health. It's a positive trait that emphasises physical, social, cognitive, emotional, and spiritual well-being. The cornerstone of good health and the cutting edge of prevention is optimal nutrition, which provides all nutrients in both kind and quantity. The foods we eat, and the nutrients they should offer, are the most important long-term environmental influences on our growth, development, functional capacities, and health. A nutritious diet promotes normal growth and development in children, as well as reduces their risk of chronic disorders such as obesity. Adults who consume a healthy diet live longer and are less likely to develop obesity, heart disease, type 2 diabetes, or cancer. People with chronic diseases might benefit from a healthy diet to help them control their symptoms and avoid complications. A nutritious diet, as well as adequate physical activity and sleep, can help youngsters grow up healthy and avoid being overweight or obese.