Hi - Give him more vegetables, fruits 3 PCs whole including citrus group, green salad, greens , give him more good quality protien like milk as he likes preferably D.T / skim , milk products like paneer, chana, cheese, & daily 50 gm curd or yogurts. if parents height good then he must v to grow up. Good balanced diet enriched with all types protien organic, dairy, plant are only helpful even for sin color. no stress. sleep more.

May be his diet routine is not good take diet counseling so that height weight should grow good. Write me on personal chat

Hi, genetic factors do determine the height of their children. Since he is an adolescent, there are hormonal changes happening in his body which are causing the change in his complexion. The same reason could be behind his increase in metabolism and shedding the baby fat. Give him a nutritious diet and allow at least an hour of physical activity something like cycling daily. Make curd, sprouts, milk, fruits nuts and water part of his daily diet. Hope this helps.