Vitamin D is responsible for the normal growth and development of the bone system and teeth. It also stimulates calcium absorption from the digestive tract into the blood. It is particularly important for children to receive sufficient amount of vitamin D during infancy and for mothers to do the same during the breast-feeding period. In turn, lack of vitamin D can result in adults suffering from fragile bones. Vitamin D is sometimes called the ''sunshine vitamin'' since it is made in your skin when you are exposed to sunlight. Seabuckthorn oils contain rich Vitamin D that helps in building bone, and more specifically in getting minerals to bone, a process called bone mineralization.