Natural Factors: Vitamin D3 1000 IU

Everyone needs vitamin D. But not everyone needs the same amount. That’s why we offer the benefits of vitamin D3 in strengths from 400 IU to 2500 IU.

Why choose Natural Factors Vitamin D3? First, our product features vitamin D3, which is better at raising your 25(OH)D levels than vitamin D2 and lasts longer in your body. Second, because vitamin D is fat-soluble and better absorbed in the presence of fat, our vitamin D3 softgels are delivered in a base of organic flaxseed oil.