The very rapid growth during puberty, determine the demand for nutrients during this period. This is the age of 11-15 years for girls and 13-16 for boys.
After the age of four years, the energy required per kilogram of body weight of the child is reduced, but the total daily amount of calories required increases as the child grows.
During childhood, growth at a steady pace, means that the needs for all nutrients are gradually increased.
Carbohydrates are the main fuel of the human body, for both children and adults. They should cover the 55% of daily energy needs and to derive, to the largest percentage, from complex carbohydrates like starch. Glucose derived from the decomposition of this molecule is the basic energy source of muscles and brain. Simple sugars are [...]
Proteins are an important source of nitrogen for the human body: the protein intake should cover both the physiological needs for nitrogen and the growth and the formation of new tissue. Furthermore, proteins with carbohydrates and fat are used by the body as an energy source. Both children from 2 years of age, and adults [...]
The need for calories consumption varies with age, body weight, physical activity and body composition. The last factor is changing dramatically, especially during childhood and adolescence, the ratio between active organs and muscles. Both organs, such as brain, heart, liver and kidney, as the muscle tissue is considered as “low in fat mass and use [...]