Ergocalciferol (Vitamin D2)
Ergocalciferol is vitamin D2, a fungal or plant-derived vitamin-D form. It is distinct from cholecalciferol (D3), and the two can differ in their effects on 25-hydroxyvitamin-D fractions. High-dose deficiency treatment should follow clinical monitoring.
Pharmacokinetic model
A route-level PK model for ergocalciferol (vitamin d2) is being prepared from published data. Dosing references, studies, and documented interactions are below; the app catalog is updated as models are validated.
Key facts
- Category
- Vitamin
- Suggested cadence
- once daily
Research behind this entry
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Bioavailability of vitamin D2 and D3 in healthy volunteers, a randomized placebo-controlled trial
Healthy volunteers received 50 micrograms/day vitamin D2, vitamin D3, or placebo for eight winter weeks. The trial separately measured 25(OH)D2, 25(OH)D3, total 25(OH)D, and PTH, demonstrating why D2 must not simply…
1 published study referenced in the app, each with a plain-language summary.