Recent research on vitamin D adds weight to the argument that we should all watch our vitamin D intake. As many as 60 percent of the UK population is vitamin D deficient and low levels have been linked to serious health problems in later life.Vitamin D is a fat-soluble vitamin which can either be ingested in food or manufactured by the body as a result of sunlight falling on the skin. People who feel they do not get enough sunshine often choose to supplement their diet with extra Vitamin D.Vitamin D is essential for healthy bones, as well as teeth, and is also thought to be important for a healthy immune system. Each tablet provides a full 400iu of vitamin D. Product Specifications Each tablet delivers: Vitamin D 10µg (400iu) Tableted with:DiCalcium Phosphate, Cellulose, Silicon Dioxide, Stearic Acid, Magnesium Stearate.Disintegration time: Less than 1 hour. Dosage:1 tablet daily with a meal.Suitable for vegetarians.