Calcium + Vitamin D2 (Ergocalciferol)
Compatible. Timing differs, so follow each supplement's own window.
Verdict
Timing plan
Can be taken togetherNothing blocks them — the same window is what produces the synergy below.
What helps
Calcium → Vitamin D2 (Ergocalciferol)
Vitamin D increases intestinal calcium absorption and bone mineralization · level AVitamin D2 (Ergocalciferol) → Calcium
Enhances intestinal calcium absorption · level ASide by side
| Calcium | Vitamin D2 (Ergocalciferol) | |
|---|---|---|
| Bioavailability | 30% | 60% |
| Safety rating | 8/10 | 8/10 |
| Cost per month | $20 | $15 |
| Daily dose | 1,000-1,200 mg | 2000-4000 IU |
| Best timing | Divided doses with meals | Morning with fat |
| Evidence level | A | A |
How this score was built
- Baseline for any untested pair: 70
- +12 — synergy at evidence level A
- +12 — synergy at evidence level A
- = 94 out of 100
Where to buy
Buying both? Check the timing plan above so they do not cancel each other out.
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Common questions
Can you take Calcium and Vitamin D2 (Ergocalciferol) together?
Compatible. Timing differs, so follow each supplement's own window. The pair scores 94 out of 100, based on 2 documented interaction records.
What should you not take with Calcium?
Nothing in this pairing clashes. Its own page lists everything Calcium is documented to conflict with.
When should you take Calcium and Vitamin D2 (Ergocalciferol)?
Calcium: Divided doses with meals. Vitamin D2 (Ergocalciferol): Morning with fat. The same window works for both.