5,000 IU 90 Soft-Gels
Vitamin D3 may be more than three times as effective in raising D levels in the bloodstream and maintaining that level for a longer period of time than other forms of vitamin D supplements.
Vitamin D3 is a fat-soluble vitamin and is naturally found in very few food-based sources. Due to this fact, humans benefit from supplementing it with products such as Vitamin D3.
Vitamin D’s functions in the body are very wide-ranging. When skin is exposed to UV sunlight, the body produces a form of vitamin D nearly identical to vitamin D3, also called cholecalciferol.