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 the deficiency of this nutrient causes various preventable disorders. Similarly, this important nutrient is increasingly in the news as more and more research highlights the importance of maintaining proper vitamin D levels. There are many studies on vitamin D that support the argument that we should all monitor our intake of vitamin D. Vitamin D is a fat-soluble vitamin that can be ingested with food or manufactured by the body as a result of the incidence of sunlight on our skin. People with little exposure to sunlight more and more often decide to supplement their diet with an extra amount of vitamin D intake. Currently, regardless of the country where you live, there is very little exposure to sunlight. If you leave home for work, by subway, car or bus, staying indoors for 8 hours or more, then the natural benefit of sunlight that we receive is 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.