What is the best form of vitamin k?
6 forms compared by what actually reaches your bloodstream. Absorption ranges from 60% to 95% — a difference that matters more than the milligrams on the label.
Ranked by absorption
Higher means more of the dose reaches youShort answer
Vitamin K2 MK-7 for Bone and Cardiovascular Health absorbs best — 95%.
Bone health & cardiovascular protection. Typical dose 100-200μg daily, about $35 a month. The cheapest option is Vitamin K1 (Phylloquinone) at $8, but it only absorbs at 80%.
Every form side by side
| Form | Absorbed | Safety | Per month | Dose | Evidence |
|---|---|---|---|---|---|
| Vitamin K2 MK-7 for Bone and Cardiovascular Health | 95% | 9/10 | $35 | 100-200μg daily | A |
| Vitamin K2 (Bone Health) | 85% | 9/10 | $35 | 100-200mcg | A |
| Vitamin K2 (MK-9) | 85% | 7/10 | $120 | 50-200 mcg (experimental) | C |
| Vitamin K2 (MK-7) | 80% | 9/10 | $25 | 100-200 mcg | B |
| Vitamin K1 (Phylloquinone) | 80% | 9/10 | $8 | 90-120 mcg | A |
| Vitamin K2 (MK-4) | 60% | 9/10 | $35 | 15-45 mg (divided doses) | B |
Head to head
How to read this
- Absorption is the share of the dose that reaches your bloodstream — the number that decides whether the milligrams on the label mean anything.
- A cheaper form at half the absorption is not cheaper per unit delivered.
- Safety here reflects tolerance at normal doses, not toxicity risk.
- Evidence A means the form itself was studied, not just the parent compound.
Common questions
What is the best form of vitamin k?
Vitamin K2 MK-7 for Bone and Cardiovascular Health — it absorbs at 95%, the highest of the 6 forms here. Bone health & cardiovascular protection. Typical dose 100-200μg daily.
Which form of vitamin k is worst absorbed?
Vitamin K2 (MK-4) at 60%. It is usually the cheapest option, which is exactly why it ends up in budget products.
Is the expensive form of vitamin k worth it?
Compare per unit delivered, not per bottle. Vitamin K1 (Phylloquinone) costs $8 a month at 80% absorption, Vitamin K2 MK-7 for Bone and Cardiovascular Health costs $35 at 95%.
How much vitamin k should you take?
Doses differ by form: Vitamin K2 MK-7 for Bone and Cardiovascular Health 100-200μg daily; Vitamin K2 (Bone Health) 100-200mcg; Vitamin K2 (MK-9) 50-200 mcg (experimental); Vitamin K2 (MK-7) 100-200 mcg.