According to the national center for health statistics over 35 of americans are vitamin d deficient available in the most highly bioavailable form natures plus vitamin d3 2500 iu softgels provide optimal levels of vitamin d in one easy to swallow softgel allowing consumers to obtain the vitamin d support they require for healthy bones in the rock solid natures plus tradition natures plus vitamin d3 2500 iu softgels conforms to the strictest standards for purity including ca