Only a few foods naturally contain vitamin D including: fatty fish and cod liver oil. Fortified foods such as milk and cereal are the major dietary sources of vitamin D. It is estimated that 40% of the U.S. population is vitamin D deficient, therefore supplementing the diet with extra vitamin D is essential for optimal health. Numerous factors influence the skin's synthesis of vitamin D including, location, climate, sun exposure, skin color, age and use of sunscreen. When you combine all of the factors that influence vitamin D synthesis with the existing widespread deficiency, vitamin D supplementation is the most efficient and convenient way to ensure optimal vitamin D intake.* Benefits: Contains vitamin D-3 (cholecalciferol), a well absorbed form of Vitamin D. Sourced from lanolin (vegetarian source of Vitamin D) Easy to swallow softgel capsule Gluten free Vitamin D is essential for calcium and phosphorus absorption and utilization.* Stimulates activity of bone producing cells, which helps maintain bone density and strength.* Helps maintain adequate blood calcium levels which is essential for functions such as blood clotting, muscle contraction and heart function. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.