Vitamin D-3 (400 IU) 100 Softgels per Bottle (3 Pack)

What the brand says

The most potent source of Vitamin D is the sun. Although to be more accurate, it is the action of the suns energy on melanin in human skin actually produces the Vitamin D. Given the easy access to sunlight, it would seem that of all vitamins, this is one that we would never need to introduce in supplement form into our diets. And yet, this is not necessarily the case. Vitamin D (as cholecalciferol) 400 iu 100%