Children between 12-13 years of age must have changed body. To have access to adult. If teenagers get food that is adequate in quantity, weight and nutrition principles may be increased by up to a year, 5-10 kg and height can be increased by up to a year, 5-10 cm. pediatric nutrition may well into adolescence, faster than the normal 1-2 years old, so young, so should get all kinds of nutrients because the body must use those nutrients to full growth. The food we eat contains many nutrients which will be utilized by different parts of the body. In nutrition.