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.
Registry check · Vitamin K2 (MK-7)
Does anyone independently verify Vitamin K2 (MK-7) supplements?
We could not confirm a single one of these 5 products in any registry, and none of them claims otherwise. Not one brand here displays a certification mark, so on independent verification all 5 start level.
5 checked against all 5,317 US NSF, USP and Informed Sport listings, 2026-08-25. Full method and limitations.
What 5 Vitamin K2 labels show
Priced per day, these vitamin K2 products run $0.07 to $0.57 — a 8.1× gap between the cheapest and dearest vitamin K2 here, across 4 brands.
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.
| Product | Brand | Dose / Serving | Cost / Day | Certification (as labelled) | 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 | $0.32 | 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 $13.46.
Dose check · Vitamin K2
2 of these 5 cannot be taken at the studied Vitamin K2 dose
2 products on this page deliver more than 200 mcg in a single capsule — Life Extension Super K, NOW Foods Vitamin K2 (MK-7) 300 mcg — and a capsule cannot be halved, so there is no way to take them at the studied amount. That is not an argument against buying Vitamin K2; it is the reason the cheapest row per milligram is not automatically the one to click.
The label trap on Vitamin K2:MK-7 and MK-4 doses are not interchangeable; most everyday supplements use MK-7. Critical: opposes warfarin — do not start/stop/change without a doctor managing it
Method: studied range from our own Vitamin K2 dosage guide (PMID 23525894), priced against the 5 products above — capsules in whole servings, powders in fractions. Trial doses, not a prescription.
The shelf · Vitamin K2
Pack sizes differ 8×, so the shelf price tells you very little
Sports Research Vitamin D3 + K2 holds 30 servings and Nutricost Vitamin K2 MK-7 100 mcg holds 240 — the same shelf price buys 8× more of one than the other, which is why all 5 rows above are priced per day. On that basis Nutricost Vitamin K2 MK-7 100 mcg is the cheapest at 7¢ and Sports Research Vitamin D3 + K2 the dearest at 57¢.
Method: the 5 Vitamin K2 products above, compared on label facts — serving size, servings per container, form, price. Not a dosing recommendation.
The evidence · Vitamin K2
What the published reviews of Vitamin K2 concluded
- Efficacy of vitamin K2 in the prevention and treatment of postmenopausal osteoporosis: A systematic review and meta-analysis of randomized controlled trials. · Frontiers in public health, 2022
“The results of this meta-analysis seem to indicate that VK2 supplementation has a positive effect on the maintenance and improvement of BMD LS in postmenopausal women, and it can also reduce the fracture incidence, serum uc-OC levels and the ratio of uc-OC to cOC.”
- Efficacy and safety of vitamin K2 for postmenopausal women with osteoporosis at a long-term follow-up: meta-analysis and systematic review. · Journal of bone and mineral metabolism, 2022
“This meta-analysis and systematic review seemed to support the hypothesis that vitamin K2 plays an important role in the maintenance and improvement of BMD, and it decreases uc-OC and increases OC significantly at a long-term follow-up.”
- The effect of vitamin K2 supplementation on bone turnover biochemical markers in postmenopausal osteoporosis patients: a systematic review and meta-analysis. · Frontiers in endocrinology, 2025
“Vitamin K2 supplementation improves key bone turnover biomarkers, particularly OC and ucOC. These findings support its role in bone metabolism, though further long-term studies are needed to confirm clinical benefits, such as increased bone mineral density.”
- Vitamin K2 Supplementation and Clinical Outcomes in Hepatocellular Carcinoma Patients: A Meta-Analysis with Trial Sequential Analysis. · Nutrition and cancer, 2026
“This study suggests substantial benefits associated with VK supplementation in HCC patients, particularly in reducing DR and mortality across one, two, and three years. Importantly, these improvements were achieved without a significant increase in adverse events, indicating good tolerability of VK supplementation in this population.”
Method: PubMed searched in humans for systematic reviews and meta-analyses with Vitamin K2 in the title; these 4 of the 29 that qualified are shown with the authors’ own conclusion quoted rather than summarised. What it cannot tell you: whether Vitamin K2 will work for you — each of these reports an average across trials published 2022–2026, and null findings are shown here as readily as positive ones.
How these 5 Vitamin K2 (MK-7) products were ranked
Not one of these 5 vitamin K2 products could be confirmed in the NSF, USP or Informed Sport registries, so verification separates none of them and the ranking falls to cost per day at the labelled serving. Commission does not enter it: the rate is the same whichever vitamin K2 you buy. Full methodology.