Essential Vitamin D Supplement: Vitamin D3 supports bone, breast, prostate, and colon health; vitamin D3 supports calcium absorption for bone health | Breast & Immune Health: Vitamin D3 supports breast health and prostate tissue by helping maintain healthy blood vessel function; supports immune cell activity | Immune & Heart Health: Vitamin D3 supports colon health by supporting healthy cellular function; supports cardiovascular health | Pure Quality: Our supplements are made with premium ingredients sourced from trusted suppliers and guided by nutritional experts, then manufactured and tested to verify potency and purity | Pure Difference: What we leave out matters, too; Pure Encapsulations products are FREE FROM common allergens, artificial or unnecessary ingredients, and GMOs