Vitamin Supplement. The sunshine vitamin. Supports bone, breast, immune & colon health. Vitamin D3 is an essential nutrient that works with calcium to help develop strong bones and teeth. This high-potency vitamin D supplement also assists in maintaining breast health and supports a healthy antibody response. An analysis of 5 studies concluded that increasing vitamin D intake up to 2000 IU per day could promote colon health. Recent evidence also indicates that increasing vitamin D intake can support the health of the pancreas.