Since 1947 Maintains Healthy Bones & Teeth Supports A Healthy Immune System Certified Gluten-Free Non-GMO Gluten, Wheat & Dairy Free Kosher Parve 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. The Vitamin D3 in this product is the same form produced by the body when our skin is exposed to sunlight. As we age, our bodies may produce this important nutrient less efficiently. This formulation provides premium Vitamin D3 in convenient, easy to swallow vegetable capsules.