Caloric intake varies with age. Levels of nutrients that are required also vary with age. In some cases, intake is decrease with age, while in other cases, intake is increased with age. This fact applies to almost all components of the diet. Most components of the diet are smallest in small children, and then increase when a person grows out of adolescence. In a senior individual, it may be very important to increase calcium intake above the normal adult levels while at the same time consuming less calories for energy requirements.
There are six nutrient groups which are needed in appropriate amounts in a balanced diet. For details, visit Balance diet.