Vitamin d3 5000iu capsules contain vitamin d3 which is a fat soluble vitamin that is synthesised in the human body on exposure to sunlight vitamin d3 plays a vital role in numerous functions of the body it is essential for the maintenance of healthy bones and teeth the absorption of calcium and phosphorus muscle function and the process of cell division vitamin d3 is also beneficial for the enhancement of the hormonal cycle skin health mood and cognitive performance vitamin d3 5000iu ca