Magnesium Oxide + Vitamin D3 (Calcidiol)
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
Magnesium Oxide → Vitamin D3 (Calcidiol)
Cofactor for vitamin D converting enzymes · level AVitamin D3 (Calcidiol) → Magnesium Oxide
Cofactor for vitamin D converting enzymes · level ASide by side
| Magnesium Oxide | Vitamin D3 (Calcidiol) | |
|---|---|---|
| Bioavailability | 15% | 95% |
| Safety rating | 7/10 | 6/10 |
| Cost per month | $8 | $80 |
| Daily dose | 400-800 mg | 5-20 mcg (medical supervision) |
| Best timing | Divided doses with meals | With fat containing meal |
| Evidence level | A | B |
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 Magnesium Oxide and Vitamin D3 (Calcidiol) 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 Magnesium Oxide?
Nothing in this pairing clashes. Its own page lists everything Magnesium Oxide is documented to conflict with.
When should you take Magnesium Oxide and Vitamin D3 (Calcidiol)?
Magnesium Oxide: Divided doses with meals. Vitamin D3 (Calcidiol): With fat containing meal. The same window works for both.