Nature39s plus vitamin d3 5000 iu provides vitamin d3 natures most bioavailable form in one easy to swallow softgel studies indicate that 5000 iu of vitamin d3 every day can help many people achieve optimal calcium absorption and support healthy bone density yet according to the national center for health statistics more than 35 of americans dont even get the minimum daily value dv of 400 iu which only serves to prevent deficiency natures plus vitamin d3 5000 iu provides the su