Are you looking for a higher strength vitamin D? Then look no further - each of our new high strength vegetarian capsules provides 2000iu vitamin D3, the active form of the vitamin. Research suggests that as many as one in five people in the UK have low levels of vitamin D and three in five people in the UK may have sub-optimal levels of this important nutrient. One factor is lack of exposure of the skin to sunlight, our principal method of producing vitamin D in the body. Needless to say, this "sunshine" vitamin is in particularly short supply during the winter months as we can only make vitamin D through our skin from March to October in the UK. Low vitamin D levels are linked to many health conditions including bone pain and fractures and as there are only a few food sources of vitamin D, most of us will need to supplement to make sure we have sufficient vitamin D. As well as facilitating calcium absorption for healthy bones and teeth, vitamin D also contributes to the normal function of muscles and the immune system.