WHAT ARE VITAMIN D3 TABLETS 5000IU? BULK POWDERS™ Vitamin D3 Tablets 5000iu are a specific, highly bio-available form of Vitamin D, providing 5000iu per tablet. Not only is this double the dosage of many competitor products, but it’s offered at a far better price. Vitamin D is a fat soluble vitamin that contributes to muscle function, normal bones, immune function as well as playing a role in cell division. Vitamin D3, also referred to as Cholecalciferol, can be consumed in the