LAMBERTS® Vitamin D is present in our products in the natural form D3 (as cholecalciferol), which is the most easily absorbed form. The World Health Organization warns that a deficiency in this nutrient causes various preventable disorders. Likewise, this important nutrient is increasingly in the news as more and more research highlights the importance of maintaining adequate vitamin D levels. There are many studies on vitamin D that support the argument that we should all monitor our vitamin D intake. Vitamin D is a fat-soluble vitamin that can be ingested through food or manufactured by the body as a result of sunlight hitting our skin. People with little exposure to sunlight are increasingly choosing to supplement their diet with extra vitamin D. Currently, regardless of the country you live in, there is very little exposure to sunlight. We leave home for work, either by subway, car, or bus, spending eight or more hours indoors, so the natural benefits of sunlight we receive are minimal. Vitamin D is essential for healthy bones and teeth and is important for a healthy immune system, normal muscle function, and the normal absorption and utilization of calcium and phosphorus.