Since 1947 Cholecalciferol Maintains Healthy Bones & Teeth Supports a Healthy Immune System Gluten, Wheat & Dairy Free Kosher Parve Non-GMO HALAL Dietary Supplement Vitamin D is a fat-soluble vitamin that is required to promote calcium absorption, which helps to maintain healthy bones and teeth. Vitamin D also supports a healthy immune system and may support neuromuscular health. The Vitamin D3 in this product is the same form produced by the body when our skin is exposed to sunlight. This formulation offers natural Vitamin D3 is convenient, easy to swallow vegetable capsules.