Is there such a thing as a wonder vitamin? Vitamin K2 has certainly been a strong contender for that title for some time, yet it remains one of the most overlooked nutrients in supplementation. This is a significant oversight. Vitamin K2 may support bone health by helping direct calcium to where it belongs, contribute to normal cardiovascular function, and play a role in maintaining healthy teeth and immunity. It also works synergistically with other key nutrients like vitamin D3, making it a cornerstone of comprehensive wellness support. With all of this in mind, choosing the right vitamin K2 supplement matters enormously.
What Makes the Best Vitamin K2 Supplement?
The vitamin K2 supplement market is large, but quality varies dramatically between products. The vast majority of budget supplements contain K2 as MK-4 — a form with relatively low bioavailability that remains active in the body for only a few hours. Another form, MK-9, has not been sufficiently studied, and its half-life in the body is still unknown. The undisputed leader among K2 forms is MK-7, but even here, several important factors should be considered.
The first is the bacterial strain used to produce the vitamin. Genuine, high-quality K2 MK-7 is derived from Bacillus subtilis natto or Bacillus licheniformis, with the former widely regarded as the best source available. Relatively few laboratories worldwide produce authentic natto-derived K2, which is why sourcing matters.
Equally important is the extraction method. Many manufacturers use hexane extraction — a chemical solvent that may leave residues in the final product. Opting for a supplement produced without harsh chemicals is a healthier choice. For the same reason, the ingredient list should be as short as possible: K2 MK-7, a capsule shell, and only trace amounts of anti-caking and bulking agents. The capsule shell itself also matters — plant-based (HPMC) shells are more expensive to produce but are generally considered higher quality and healthier than bovine gelatine alternatives.
[tip:Vitamin K2 is a fat-soluble vitamin. Taking your K2 supplement with a meal containing healthy fats can more than double its absorption. This is far more effective than choosing supplements that add oil directly to the formula — added oils, such as linseed oil, can actually go rancid over time and weaken the product.]
Which Form of Vitamin K2 Should You Choose?
To summarise the key differences between available forms:
- K2 MK-4 — low bioavailability, remains active for only a few hours, requires multiple daily doses
- K2 MK-9 — insufficiently researched, unknown half-life, not recommended as a primary choice
- K2 MK-7 — the gold standard, highest bioavailability, remains active in the body for up to 72 hours, ideally derived from natto fermentation
When choosing a K2 MK-7 supplement, look for products with a clean, minimal composition, a plant-based capsule shell, and no added oils. The combination of vitamin K2 with vitamin D3 is highly recommended, as these two vitamins work synergistically — D3 helps the body absorb calcium, while K2 directs that calcium to the bones and teeth rather than allowing it to deposit in arteries. Adding calcium or magnesium can further enhance K2's potential, but always in sensible, well-formulated combinations.
Why Brand Quality Matters for Vitamin K2
With vitamin K2, choosing a reputable brand is particularly important. Established manufacturers are far more likely to use the MK-7 form derived from natto fermentation, apply solvent-free extraction methods, use plant-based capsule shells, and keep excipients to a minimum. This means that the K2 in each dose is actually absorbed by the body rather than largely excreted. A cheap K2 supplement from an unknown manufacturer may well contain the least bioavailable form in a formula packed with unnecessary fillers — saving money at the expense of any real benefit.
Top 12 Vitamin K2 Supplements at Medpak
Below you will find our carefully curated selection of 12 highly rated vitamin K supplements available at Medpak. The ranking covers standalone K2 products and popular K2+D3 combinations across different formats and price points.
1. Now Foods Vitamin K2 MK-7 100 mcg - 120 Veg Capsules
A flagship K2 supplement from one of the world's most trusted supplement brands. Now Foods delivers 100 mcg of K2 in the preferred MK-7 form in plant-based capsules with a clean ingredient list. The 120-capsule pack offers a four-month supply, making it excellent value for daily use.
2. Aliness Vitamin K2 Mono FORTE MK-7 200 mcg - 60 Capsules
A high-dose standalone K2 MK-7 formula from Aliness, providing 200 mcg per capsule — ideal for those looking for a stronger daily dose. The "Mono" designation means this is a single-ingredient K2 product with no added vitamins, allowing precise control over your supplementation.
3. Solgar Vitamin K2 MK-7 100 mcg - 50 Veg Capsules
Solgar has been setting quality standards for over 75 years, and their K2 MK-7 is no exception. Delivered in vegetarian capsules with a characteristically clean Solgar formula, this product is a go-to for those who prioritise brand heritage and ingredient transparency.
4. Jarrow Formulas Vitamin K2 MK-7 90 mcg - 60 Softgels
Jarrow Formulas uses MenaQ7® — one of the most clinically researched forms of K2 MK-7 on the market. At 90 mcg per softgel, this is a well-dosed option backed by a brand known for its science-driven formulations.
5. Kenay Vitamin K2 MenaQ7 (from chickpea) - 60 Capsules
A unique offering in the K2 market — Kenay's product uses MenaQ7® derived from chickpea fermentation rather than soy-based natto, making it an excellent choice for individuals with soy sensitivities. Clean formula, reliable brand, and proven MK-7 source.
6. Formeds Bicaps K2 MK-7 - 60 Capsules
Formeds is a Polish brand renowned for minimalist, ultra-clean formulations. Their Bicaps K2 MK-7 delivers the vitamin in a plant-based HPMC capsule with virtually no unnecessary excipients — a purist's choice for K2 supplementation.
[products:now-foods-vitamin-k2-mk-7-100-mcg-120-veg-capsules, aliness-vitamin-k2-mono-forte-mk-7-200-mcg-60-capsules, solgar-vitamin-k2-mk-7-100-mcg-50-veg-capsules, jarrow-formulas-vitamin-k2-mk-7-90-mcg-60-softgels, kenay-vitamin-k2-menaq7-from-chickpea-60-capsules, formeds-bicaps-k2-mk-7-60-capsules]
7. Aliness Vitamin K2 FORTE MK-7 200 µg with Natto D3 - 60 Capsules
A premium K2+D3 combination from Aliness, pairing 200 mcg of MK-7 with vitamin D3 derived from natural sources. The synergy between K2 and D3 is one of the best-documented nutrient partnerships — D3 supports calcium absorption while K2 helps direct it to bones and teeth.
8. Dr. Jacob's Vitamin K2, drops - 20 ml
For those who prefer liquid supplementation, Dr. Jacob's offers K2 in a convenient dropper bottle. Drops allow highly flexible dosing and are ideal for people who have difficulty swallowing capsules. Dr. Jacob's is a respected European brand known for quality and innovation.
9. Healthy Origins Vitamin K2 as MK-7 100 mcg - 180 Softgels
An outstanding value option with 180 softgels per pack — a full six-month supply. Healthy Origins uses genuine MK-7 at a competitive price point, making this one of the most cost-effective K2 supplements available per serving.
10. Life Extension Low Dose Vitamin K2 (MK-7) 45 mcg - 90 Softgels
Life Extension's low-dose K2 is designed for individuals who want gentle, everyday K2 support — particularly useful for those already getting some K2 from their diet or who take it alongside a vitamin D supplement. Life Extension is consistently ranked among the world's most science-driven supplement brands.
11. Thorne Research Vitamin D + K2 - 30 ml
Thorne Research represents the upper tier of supplement quality. Their liquid D+K2 formula delivers both vitamins in a precisely dosed dropper format. Thorne products are used by professional athletes and healthcare practitioners alike — a choice for those who want the absolute best.
12. Aura Herbals Vitamin K2mk7 200 mcg - 90 Capsules
Aura Herbals is a Polish brand that has built a strong following for high-quality, accessible supplements. Their K2 MK-7 at 200 mcg per capsule offers a generous dose at a competitive price, with a 90-capsule pack providing three months of daily supplementation.
[products:aliness-vitamin-k2-forte-mk-7-200-µg-with-natto-d3-60-capsules, dr-jacobs-vitamin-k2-drops-20-ml, healthy-origins-vitamin-k2-as-mk-7-100-mcg-180-softgels, life-extension-low-dose-vitamin-k2-mk-7-45-mcg-90-softgels, thorne-research-vitamin-d-k2-30-ml, aura-herbals-vitamin-k2mk7-200-mcg-90-capsules]
Vitamin K2 and Bone Health
One of the primary reasons people supplement with vitamin K2 is its role in calcium metabolism. Without adequate K2, calcium absorbed through diet and vitamin D supplementation may deposit in soft tissues — including arteries — rather than being directed to bones and teeth where it is needed. This is why K2 is considered essential for anyone supplementing with calcium or vitamin D3, and why it is particularly relevant for those concerned about bone and joint health.
For comprehensive cardiovascular support, the combination of vitamin K2 with omega-3 fatty acids and magnesium is also worth considering as part of a broader wellness strategy.
[warning:If you are taking anticoagulant medications (such as warfarin), consult your healthcare professional before supplementing with vitamin K2. Vitamin K directly influences blood clotting and may interact with these medications.] [note:All Medpak products are shipped from within the EU, ensuring fast delivery and no customs fees for European customers.]
Key Takeaway: When it comes to vitamin K2, not all supplements are equal. Always choose the MK-7 form — ideally derived from natto fermentation — in a product with a clean, minimal ingredient list and a plant-based capsule. Pairing K2 with vitamin D3 enhances both nutrients' effectiveness, and taking your supplement with a fat-containing meal can more than double absorption. Invest in quality, and your bones, heart, and teeth will benefit.
