Key Information
Compare All Forms
Compare different forms of Vitamin D3 by bioavailability, conversion rates, and active ingredient content:
| Form | Tier | Steps |
Vitamin D3 Activity (IU) |
Bioavailability | Action |
|---|---|---|---|---|---|
| Vitamin D3 (Cholecalciferol) | Tier 2 | 1 | 40× | Moderate bioavailability form. Reliable form that works well but requires 1-2 step conversions by the body. Good balance of cost and effectiveness. | View → |