vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D cholecalciferol vitamin D Vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D vitamin D Vitamin D vitamin D vitamin D Vitamin D vitamin D vitamin D vitamin D Vitamin D http://www.medicinenet.com/vitamin_d-oral/article.htm vitamin D Vitamin D vitamin D vitamin D cholecalciferol vitamin D