The nutrients in the food we take consist of proteins, carbohydrates, vitamins, minerals, fat and water. Imbalance in nutrients causes ill health from excess or deficiency in any one particular nutrient that in turn affects the functionality of the body. Malnutrition or imbalanced nutrition in a child may affect brain, other vital organs, eyesight, weight, height and formation of other parts of the body.
Nutrition as a science developed due to its importance for sports performance. It was considered to be important for the health and performance of athletes and sportsmen. Advances and research in this branch of science has now helped in understanding the importance of nutrition for common people as well.