Vitamin B12 (Methylcobalamin) + Vitamin K2 (MK-4)
Separate by 2-4 hours to avoid the interaction below.
Verdict
Timing plan
Separate themThese two compete on absorption. Splitting the day keeps both effective.
What clashes
Vitamin K2 (MK-4) → Vitamin B12 (Methylcobalamin)
Competition for similar metabolic pathways · mildVitamin K2 (MK-4) → Vitamin B12 (Methylcobalamin)
Competition for fat-soluble vitamin absorption · mildWhat helps
Vitamin B12 (Methylcobalamin) → Vitamin K2 (MK-4)
Sequential steps in methylation pathway · level AVitamin K2 (MK-4) → Vitamin B12 (Methylcobalamin)
Complementary calcium metabolism pathways · level ASide by side
| Vitamin B12 (Methylcobalamin) | Vitamin K2 (MK-4) | |
|---|---|---|
| Absorption score | 85/100 | 60/100 |
| Cost per 100 mg delivered | $78.43 | $6.48 |
| Safety rating | 10/10 | 9/10 |
| Cost per month | $15 | $35 |
| Daily dose | 500-1000 mcg | 15-45 mg (divided doses) |
| Best timing | Morning sublingual | Multiple doses with fat |
| 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
- −12 — mild clinical conflict
- −12 — mild clinical conflict
- = 70 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 B12 (Methylcobalamin) and Vitamin K2 (MK-4) together?
Separate by 2-4 hours to avoid the interaction below. The pair scores 70 out of 100, based on 4 documented interaction records.
What should you not take with Vitamin B12 (Methylcobalamin)?
In this pairing the issue is: High doses may interfere with K2 function Separate them by two to four hours.
When should you take Vitamin B12 (Methylcobalamin) and Vitamin K2 (MK-4)?
Vitamin B12 (Methylcobalamin): Morning sublingual. Vitamin K2 (MK-4): Multiple doses with fat. Keep at least a two-hour gap between them.