Vitamin D3 + Vitamin K1 (Phylloquinone)
Compatible. Timing differs, so follow each supplement's own window.
0
compatibility
0
synergies
0
conflicts
Verdict
78
out of 100
Works better together
Compatible. Timing differs, so follow each supplement's own window.
Timing plan
Can be taken together
Vitamin D3
Morning with fat
1000-2000 IU
Vitamin K1 (Phylloquinone)
With fat meal
90-120 mcg
Nothing blocks them — the same window is what produces the synergy below.
What helps
+
Both contribute to bone health
Vitamin K1 (Phylloquinone) → Vitamin D3
D increases calcium absorption, K1 helps with bone proteins · level BSide by side
| Vitamin D3 | Vitamin K1 (Phylloquinone) | |
|---|---|---|
| Bioavailability | 85% | 80% |
| Safety rating | 9/10 | 9/10 |
| Cost per month | $8 | $8 |
| Daily dose | 1000-2000 IU | 90-120 mcg |
| Best timing | Morning with fat | With fat meal |
| Evidence level | A | A |
How this score was built
- Baseline for any untested pair: 70
- +8 — synergy at evidence level B
- = 78 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 Vitamin D3 and Vitamin K1 (Phylloquinone) together?
Compatible. Timing differs, so follow each supplement's own window. The pair scores 78 out of 100, based on 1 documented interaction records.
What should you not take with Vitamin D3?
Nothing in this pairing clashes. Its own page lists everything Vitamin D3 is documented to conflict with.
When should you take Vitamin D3 and Vitamin K1 (Phylloquinone)?
Vitamin D3: Morning with fat. Vitamin K1 (Phylloquinone): With fat meal. The same window works for both.