* Supports Bone, Breast, Immune & Colon Health * Vitamin Supplement * Guaranteed Quality - Laboratory Tested Smart Facts Vitamin D3 is an essential nutrient that works with Calcium to help develop strong bones and teeth. Vitamin D3 also supports normal antibody production by the immune system and supports breast health. Increasing Vitamin D intake can support the health of the pancreas and colon. Supplementing with Sundown Chewable Vitamin D3 is an easy and convenient way to increase your daily Vitamin D intake.