Children need vitamin D for growth. Bones and teeth grow and strengthen during childhood and adolescence. In addition to bone-building calcium, vitamin D is essential for the formation of strong bones and teeth, as vitamin D contributes to the normal absorption of calcium and phosphorus, as well as the maintenance of normal bones and teeth. Good immunity also helps the child's growth. Vitamin D benefits the normal functioning of the immune system. Vitamin D supplements are recommended for children all year round. A nutritional supplement does not replace a varied and balanced diet or a healthy lifestyle.