Best Vitamin K2 (MK-7) Supplements 2026: Cost per Effective Dose
Top pick for Vitamin K2 (MK-7): Nutricost Vitamin K2 MK-7 100 mcg — 100mcg per 1 softgel, $0.07/day. Our best-value pick.
All Vitamin K2 (MK-7) Supplements Compared
MK-7 is the form worth paying for, because its half-life is measured in days rather than hours — that is why it works as a once-daily capsule while MK-4 needs repeat dosing to hold levels. Most products in the Verified Supplement Data catalog land at 100 mcg of MK-7, which is the dose used in the bone and arterial research. ⚠ Vitamin K directly opposes warfarin: if you take an anticoagulant, do not start K2 without speaking to whoever manages your dosing.
All 5 products sorted by cost per labelled serving (lowest first). Dose, certification, and pricing verified against NIH DSLD and manufacturer data.
Read the dose column before the price column. Servings in this category are not equivalent — they range from 100 to 1,180 mcg per serving. A lower cost per day here can simply mean a smaller serving, so the cheapest row is not automatically the best value.
| Product | Brand | Dose / Serving | Cost / Day | Certification | Pick | Buy |
|---|---|---|---|---|---|---|
| Nutricost Vitamin K2 MK-7 100 mcg | Nutricost | 100mcg / 1 softgel | $0.07 | None | Best Value | Buy |
| NOW Foods MK-7 Vitamin K2 100 mcg | NOW Foods | 100mcg / 1 capsule | $0.22 | None | Quality Pick | Buy |
| Life Extension Super K | Life Extension | 1180mcg / 1 softgel | $0.25 | None | Buy | |
| NOW Foods Vitamin K2 (MK-7) 300 mcg | NOW Foods | 300mcg / 1 capsule | $0.31 | None | Buy | |
| Sports Research Vitamin D3 + K2 | Sports Research | 100mcg / 1 softgel | $0.57 | None | Buy |
Our Picks
Best Value: Nutricost Vitamin K2 MK-7 100 mcg
100mcg per 1 softgel. $0.07/day. 240 servings per container at $17.95.
Quality Pick: NOW Foods MK-7 Vitamin K2 100 mcg
100mcg per 1 capsule. $0.22/day. 60 servings per container at $13.35.
How We Rank Vitamin K2 (MK-7) Supplements
Every product is evaluated on three criteria:
- Cost per day. Not cost per pill or cost per bottle — what it actually costs per day at the product's labelled serving. Where a category's servings differ in strength we flag it above the table, because cost per day is only comparable when the doses are.
- Third-party certification. USP Verified, NSF Certified for Sport, and ConsumerLab Approved indicate independent testing for purity, potency, and contaminants.
- Bioavailable form. We prioritize products using the specific chemical form shown to be most effective in published research.
Rankings are not influenced by affiliate commissions. We earn the same commission regardless of which product you choose. Read our full methodology.
Personalize Your Vitamin K2 (MK-7) Choice
Not sure which vitamin k2 (mk-7) supplement is right for you? Use our free tools:
- DNA Supplement Analyzer — upload 23andMe or AncestryDNA data to check for genetic variants affecting vitamin k2 (mk-7) metabolism. Runs entirely in your browser.
- Lab Results Interpreter — enter your blood test values to get personalized dosing recommendations.
- Supplement Stack Builder — build a complete protocol based on your age, sex, medications, and goals.
- Supplement Audit — already taking vitamin k2 (mk-7)? Check if you have the right form and dose.