Vitamin K2 · 8 products
What vitamin K2 really costs, and how much of its testing you can see.
Every price is converted to cost per 100 mcg of vitamin K2, using the K2 amount on the Supplement Facts panel. Each product shows whether it's MK-7 or MK-4 (or both) and any added vitamin D3. Testing transparency gets its own grade, A to C, and is never blended into the price.
| Product | Cost per 100 mcg | Best price | Tier | Testing |
|---|---|---|---|---|
| $0.17 | Vitacost$20.25 / 120 servingsChecked Oct 22, 2026 | C | No current certificationNo COA found | |
NaturesPlusSource of Life Garden Vitamin K2 | $0.22 | Vitacost$16.11 / 60 servingsChecked Oct 22, 2026 | C | No current certificationNo COA found |
Doctor's BestNatural Vitamin K2 MK-7 100 mcg, 60 Veggie Caps | $0.23 | Vitacost$13.99 / 60 servingsChecked Oct 22, 2026 | C | No current certificationNo COA found |
Sports ResearchVitamin K2 Plant-Based 100 mcg, 60 Veggie Softgels | $0.32 | Vitacost$18.97 / 60 servingsChecked Oct 22, 2026 | C | No current certificationNo COA found |
Life ExtensionLow Dose Vitamin K2 (MK-7), 45 mcg | $0.33 | Vitacost$13.50 / 90 servingsChecked Oct 22, 2026 | C | No current certificationNo COA found |
Jarrow FormulasMK-7 90 mcg, 90 Softgels | $0.35 | Vitacost$28.44 / 90 servingsChecked Oct 22, 2026 | C | No current certificationNo COA found |
EnzymedicaVitamin D3 + Vitamin K2 | $0.37 | Vitacost$20.24 / 60 servingsChecked Oct 22, 2026 | C | No current certificationNo COA found |
MegaFoodVitamin D3 & K2 | $0.40 | Vitacost$37.99 / 120 servingsChecked Oct 22, 2026 | C | No current certificationNo COA found |
No products match these filters.
What the tiers mean
- A
- A current third-party certification and a COA from an ISO/IEC 17025 accredited lab, testing the finished product, less than 2 years old.
- B
- Some proof of testing (a COA or a certification), but not everything Tier A needs.
- C
- No COA and no certification found.
Prices are read from each store's own page and marked stale after 14 days. A certification counts only if it appears on the certifier's own website. Star ratings are each store's own customer reviews, shown for reference; they never affect the order of the table.