Vitamin D3, Spray, 4.000 IE, 12.5 ml, OsaviDescription Vitamin D contributes to the maintenance of bones and teeth. Vitamin D also contributes to the normal function of the immune system. Vitamin D is also called the sunshine vitamin, as the primary source of the vitamin is the sun. Vitamin D3, Spray, 4,000 IU, 12. 5 ml, Osavi Nutritional content Vitamin D (D3, cholecalciferol) 4000 IU = 100 mcg Ingredients: Vitamin D (D3, cholecalciferol), MCT oil (medium chain triglycerides),