Vitamin D is essential for absorption of calcium to promote strong bones.* Vitamin D also supports a healthy immune system and breast and colon health.* Unconditionally guaranteed for purity, freshness and label potency. No added Sugar, Yeast, Preservatives, Artificial Flavors or Colors. 21st Century Vitamins and Supplements are manufactured in a cGMP facility under the strictest standards for product quality, including potency and purity. 21st Century prides itself on providing you with a great product at the best value. *This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.