Since 1947 Cholecalciferol Maintains Healthy Bones & Teeth Supports A Healthy Immune System Non-GMO Wheat & Dairy Free Kosher Parve Certified Gluten-Free Dietary Supplement Vitamin D is required to promote calcium absorption, which helps to maintain healthy bones and teeth. Vitamin D also supports a healthy immune system. This formulation provides Vitamin D3 in convenient, easy to swallow vegetable capsules.