Vitamin D
What is Vitamin D?
Vitamin D is a group of fat-soluble prohormones, the two major forms of which are vitamin D2 and vitamin D3. Vitamin D's major biologic function is to maintain normal blood levels of calcium and phosphorus. Vitamin D aids in the absorption of calcium, helping to form and maintain strong bones. It promotes bone mineralization in concert with a number of other vitamins, minerals, and hormones. Without vitamin D, bones can become thin, brittle, soft, or misshapen. Vitamin D prevents rickets in children and osteomalacia in adults -- skeletal diseases that result in defects that weaken bones.
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| Product Name | Brand | Size | Lowest Price | Rating | Main Ingredient Per Dollar | Go to Cheapest Store |
| Vitamin D-3 5000 IU | NOW Foods | No Ratings | 85836.91 IU of Vitamin D3 per dollar |  | ||
| Vitamin D-3 2000 IU | NOW Foods | No Ratings | 60150.38 IU of Vitamin D3 per dollar | | ||
| Vitamin D-3 1000 IU | NOW Foods | No Ratings | 40089.09 IU of Vitamin D3 per dollar | | ||
| Vitamin D - Vcaps | NOW Foods | No Ratings | 26726.06 IU of Vitamin D2 per dollar | | ||
| Vitamin D-3 & K-2 Vcaps | NOW Foods | No Ratings | 24048.10 IU of Vitamin D3 per dollar | | ||
| Vitamin D-3 400 IU | NOW Foods | No Ratings | 20869.57 IU of Vitamin D3 per dollar | |