Caffeine + Vitamin K2 (MK-4)
No documented interaction. Standard timing for each applies.
0
compatibility
0
synergies
0
conflicts
Verdict
70
out of 100
No known interaction
No documented interaction. Standard timing for each applies.
Timing plan
Can be taken together
Caffeine
Morning or pre workout
100-400mg
Vitamin K2 (MK-4)
Multiple doses with fat
15-45 mg (divided doses)
No documented interaction either way, so each keeps its own schedule.
Side by side
| Caffeine | Vitamin K2 (MK-4) | |
|---|---|---|
| Absorption score | 99/100 | 60/100 |
| Cost per 100 mg delivered | $0.13 | $6.48 |
| Safety rating | 7/10 | 9/10 |
| Cost per month | $10 | $35 |
| Daily dose | 100-400mg | 15-45 mg (divided doses) |
| Best timing | Morning or pre workout | Multiple doses with fat |
| Evidence level | A | B |
How this score was built
- Baseline for any untested pair: 70
- = 70 out of 100
Where to buy
Buying both? Check the timing plan above so they do not cancel each other out.
Affiliate links — we may earn a commission at no cost to you.
Common questions
Can you take Caffeine and Vitamin K2 (MK-4) together?
No documented interaction. Standard timing for each applies. The pair scores 70 out of 100, based on the absence of any documented interaction between them.
What should you not take with Caffeine?
Nothing in this pairing clashes. Its own page lists everything Caffeine is documented to conflict with.
When should you take Caffeine and Vitamin K2 (MK-4)?
Caffeine: Morning or pre workout. Vitamin K2 (MK-4): Multiple doses with fat. The same window works for both.