Vitamin K2 is arguably the most underrated vitamin. No, it isn’t made of some exotic organic substance found on the second highest peak of the world—K2. Rather, Vitamin K2 is mainly found in certain animals and fermented foods, which most people don’t eat enough of.
Vitamin K2 can help improve bone and dental health and may help fight cancer. It can be divided into several different subtypes. However, MK-4 and MK-7 are the most important ones. While MK-4 is derived from animal sources like dairy products, MK-7 is derived from bacterial fermentation.
Top 10 Best Vitamin K2 Supplements Tested/Ranked:
- Best Overall: Sports Research Vegan Vitamin D3 + K2 Supplement
- Best MK-4: NOW Vitamin K2
- Best MK-7: Bronson Vitamin K2 (MK-7) with D3
- Best Value: Nutricost Vitamin K2 MK-4
- Best K2 with MenaQ7: Doctor’s Best Natural Vitamin K2
- Best Liquid Form: MaryRuth’s Vitamin K2 MK-7 Liquid Drops
- Best Tablet Form: Superior Source Vitamin K2
- Best 3K: Life Extension Super K
- Best Flavored: KAL Vitamin K2 MK-7
- Best Third-Party Tested: InnovixLabs Full Spectrum Vitamin K2
How Much Do the Best Vitamin K2 Supplements Cost?
Depending on the brand, quality, and ingredients, the best vitamin K2 supplements can range from $23.95 to $12.99. Below is the complete list and what we love about each product:
| Category | Product | Name | Price | Price/Serving | Why We Love It |
| Best Overall |  |
Sports Research Vegan Vitamin D3 + K2 Supplement | $21.79 | $0.36 | Arguably the best vitamin K2 supp on the market. Delivers value, quality, and results. |
| Best MK-4 |  |
Now Vitamin K2 | $19.05 | $0.08 | A K2 product from one of the most reputed brands in the supplement industry. |
| Best MK-7 |  |
Bronson Vitamin K2 (MK-7) with D3 | $14.99 | $0.12 | A highly absorbable K2 supplement. |
| Best Value |  |
Nutricost Vitamin K2 MK-4 | $14.95 | $0.06 | The best K2 option for value hunters. |
| Best K2 with MenaQ7 |  |
Doctor’s Best Natural Vitamin K2 | $12.99 | $0.22 | Mena Q7 is obtained from chickpeas, which are naturally rich in vitamin K2, making it one of the fasted acting K2 supps on the market. |
| Best Liquid Form |  |
MaryRuth’s Vitamin K2 MK-7 Liquid Drops | $23.95 | $0.39 | Best for people who are fans of swallowing pills or capsules. |
| Best Tablet Form |  |
Superior Source Vitamin K2 | $16.49 | $0.27 | It is one of the most convenient vitamin K2 supplements on the market. |
| Best 3K |  |
Life Extension Super K | $22.5 | $0.25 | A great supp that combines vitamin K1 and K2 (MK-4 and MK-7). |
| Best Flavored |  |
KAL Vitamin K2 MK-7 | $15.99 | $0.27 | Probably the most delicious chewable MK-7 tablet on the market. |
| Best Third-Party Tested |  |
InnovixLabs Full Spectrum Vitamin K2 | $22.99 | $0.26 | A potent, transparent, and effective K2 supplement. |
Top 10 Best Vitamin K2 Supplements
Given below are the best vitamin K2 in various categories:
Best Overall
The best overall vitamin K2 supplement ticks all the right boxes — it uses high-quality ingredients, has good customer ratings, is manufactured by a reputed brand under cGMP, and is available at a competitive price.
Sports Research Vegan Vitamin D3 + K2 Supplement
Experts believe combining vitamin K2 with D3 can deliver better results than consuming K2 alone. Vitamin K2 helps ensure calcium gets deposited in your bones where it’s needed and protects arteries from calcification. On the other hand, D3 helps maintain strong bones by helping metabolize calcium and supports a healthy immune system.
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The formula uses VegaDELight vegan D3, a patented plant-based form of vitamin D3 from lichen, and MenaQ7, a patented form of vitamin K2 from chickpeas with virgin coconut oil in a vegan-certified PlantGel™ capsule.
With more than 89,000 five-star reviews on Amazon, it is the highest-rated vitamin K2 supplement on the online shopping platform. Plus, Sports Research stands behind its product with a 90-day any-reason return policy.
Who Should Buy Sports Research Vegan Vitamin D3 + K2 Supplement?
- People who want to buy the highest rated vitamin K2 supp on the market.
- Folks who want a product that combines vitamins K2 and D3.
Who Should Not Buy Sports Research Vegan Vitamin D3 + K2 Supplement?
- People who want a standalone K2 product.
Sports Research Vegan Vitamin D3 + K2 Supplement Coupon
Sports Research Vegan Vitamin D3 + K2 Supplement Coupon
Sports Research Vegan Vitamin D3 + K2 Supplement does it all. It is coupled with D3, is effectively dosed, contains high-quality ingredients, and is one of the most highly rated K2 supps on the market.
Best MK-4
Vitamin menatetrenone (MK-4) is one of the nine forms of vitamin K2. It is produced via the conversion of vitamin K1 in the body, in the testes, pancreas, and arterial walls.
NOW Vitamin K2
NOW Foods is one of the oldest and most reputed supplement brands. The family-owned business was started in 1968 and is known for its high-quality manufacturing standards.
NOW Vitamin K2 delivers 100 mcg of MK-4 and 250 mg of alfalfa powder in a single serving of one capsule. One bottle of this supp costs $19.05 and contains 250 veg capsules.
Who Should Buy NOW Vitamin K2?
- People who want an animal-derived K2 supp.
Who Should Not Buy NOW Vitamin K2?
- Folks who want a K2 supplement that has both K1 and K2.
NOW Vitamin K2 Coupon
NOW Vitamin K2 Coupon
NOW is one of the most reputed brands in the supplement industry that is known for delivering high-quality products, and its Vitamin K2 is no different.
Best MK-7
MK-7 (menaquinone) is an essential fat-soluble vitamin and is the preferable vitamin K2 source for vegans as it does not contain animal products. Furthermore, MK-7 is considered the most bioavailable form of vitamin K2.
Bronson Vitamin K2 (MK-7) with D3
This supplement combines the goodness of vitamin K2 (as MK-7) and D3. Each 120 capsule bottle of the Bronson Vitamin K2 costs $14.99, coming out to a per serving cost of $0.12.
Bronson Vitamin K2 is non-GMO tested, gluten, and soy-free. It is also lab tested to ensure the highest quality. One capsule of the supp delivers 90 mcg of MK-7 and 125 mcg of D3.
Who Should Buy Bronson Vitamin K2 (MK-7) with D3?
- Folks with digestive issues who want a highly absorbable form of vitamin K2.
Who Should Not Buy Bronson Vitamin K2 (MK-7) with D3?
- People who want a high MK-7 dose supp.
Bronson Vitamin K2 (MK-7) with D3 Coupon
Bronson Vitamin K2 (MK-7) with D3 Coupon
The budget-friendly supp from Bronson combines the goodness of vitamin D3 with vitamin K (MK-7) in optimally dosed servings.
Best Value
This category shines a light on a supp that delivers the best bang for your buck. The best value supplement will get you results without breaking your bank.
Nutricost Vitamin K2 MK-4
Nutricost has emerged as a leading supplement company for its high-quality products marketed at reasonable prices. A 240 capsule bottle of Nutricost costs $14.95, translating to a per serving cost of $0.06.
The Nutricost Vitamin K2 is non-GMO, gluten-free, and third-party tested. Each serving of the supp delivers 100 mcg of vitamin K2 (as MK-4).
Who Should Buy Nutricost Vitamin K2 MK-4?
- Folks on a tight budget.
- People who want a vitamin K2 MK-4 formula.
Who Should Buy Nutricost Vitamin K2 MK-4?
- People who want an MK-4 and MK-7 hybrid formula.
Nutricost Vitamin K2 MK-4 Coupon
Nutricost Vitamin K2 MK-4 Coupon
Nutricost Vitamin K2 MK-4 contains high-quality ingredients, has results to back its claims, and delivers the best bang for your buck.
Best K2 with MenaQ7
MenaQ7 vitamin K2 as menaquinone-7 (MK-7) is the most bioavailable, longest-lasting, and most bioactive form of vitamin K. MenaQ7 is purified from fermented chickpeas, which are naturally rich in vitamin K2. Furthermore, it is the only clinically validated, patented K2 as MK-7 available on the market.
Doctor’s Best Natural Vitamin K2
Doctor’s Best is one of the most trusted supplement brands in the industry. MenaQ7® varieties are suitable for vegans and vegetarians, free from gluten, dairy, soy, and other known allergens.
A 60 capsule bottle of the supplement costs $12.99, breaking down to a per serving cost of $0.22.
Who Should Buy Doctor’s Best Natural Vitamin K2?
- People with digestive issues who want a highly bioavailable K2 formula.
Who Should Not Buy Doctor’s Best Natural Vitamin K2?
- Folks who want an MK-7 and MK-4 hybrid vitamin K2 supp.
Doctor’s Best Natural Vitamin K2 Coupon
Doctor’s Best Natural Vitamin K2 Coupon
MenaQ7 makes the Doctor's Best one of the most bioavailable, longest-lasting, and most bioactive Vitamin K2 supps on the block.
Best Liquid Form
If you’re an exerciser, chances are you’re already taking several capsule-form supplements like multivitamins, omega-3s, vitamin D3, joint supports, vitamin E, etcetera, and adding a new cap to the list is the last thing you want to do.
However, leaving out a supp because of its capsule form isn’t the smartest decision either. This is where liquid form supps come to the rescue.
MaryRuth’s Vitamin K2 MK-7 Liquid Drops
MaryRuth’s Vitamin K2 Liquid Drops are unflavored and come in an olive oil base, meaning you could add them to water, a beverage of your choice, or put the drops directly in your mouth, making your supp routine more convenient.
MaryRuth’s liquid form K2 (MK-7) is sourced from Natto, a traditional Japanese fermented soybean product, which is the biggest natural K2 (MK-7) source.
Who Should Buy MaryRuth’s Vitamin K2 MK-7 Liquid Drops?
- Folks who do not want a capsule or tablet vitamin K2 supplement.
Who Not Should Buy MaryRuth’s Vitamin K2 MK-7 Liquid Drops?
- People on a shoestring budget.
MaryRuth’s Vitamin K2 MK-7 Liquid Drops Coupon
MaryRuth’s Vitamin K2 MK-7 Liquid Drops Coupon
If you're on the market for a liquid-form vitamin K2 supp, you cannot go wrong with MaryRuth's Vitamin K2 MK-7 Liquid Drops.
Best Tablet Form
If you’re on the market for a tablet-form K2 supplement, you cannot go wrong with the Superior Source Vitamin K2.
Superior Source Vitamin K2
This MK-7 form of K2 comes in a tiny MicroLingual® tablet form. Furthermore, it dissolves quickly when put on or under the tongue, saving you the hassle of swallowing a pill.
Superior Source pioneered the sublingual vitamins that melt quickly under the tongue and provide fast absorption, delivering the best bang for your buck.
Who Should Buy Superior Source Vitamin K2?
- People who want a convenient-to-consume form of vitamin K2 supplement.
Who Should Not Buy Superior Source Vitamin K2?
- Folks who want an MK-7 and MK-4 hybrid vitamin K2 supp.
Superior Source Vitamin K2 Coupon
Superior Source Vitamin K2 Coupon
Superior Source Vitamin K2 comes in microsized tablets that dissolve quickly in the mouth and can be taken without water. The high-quality product is a hit amongst its users.
Best 3K
While many products on the market contain vitamin K2 MK-4 and MK-7, only a few combine the goodness of both these molecules with vitamin K1, but the Life Extension Super K does just that and does it well.
Life Extension Super K
Vitamin K1 is the predominant form of vitamin K present in an average individual’s diet. K1 is found in green vegetables and plant chlorophylls. However, it is hard to absorb through real food.
The Life Extension Super K provides a potent dose of 2,600 mcg of Vitamin K. 1,500 mcg of which comes from K1; 1,000 mcg from K2 (MK-4); 100 mcg from K2 (MK-7).
Who Should Buy Life Extension Super K?
- People who want a wholesome vitamin K supplement.
Who Should Not Buy Life Extension Super K?
- People who want a combination of K2 and D3.
Life Extension Super K Coupon
Life Extension Super K Coupon
Life Extension Super K contains vitamin K1 and K2 (as MK-4 and MK-7) and is dosed generously to help meet your daily vitamin K goals. It also includes vitamin C to deliver the best bang for your buck.
Best Flavored
Let’s be honest for a moment. Vitamin C is arguably the most popular vitamin supplement because it comes in delicious flavors. The other vitamins need to follow suit if they want to achieve mass market appeal. The good news is that vitamin K2 is making progress in this regard.
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KAL Vitamin K2 MK-7
KAL Vitamin K2 MK-7 comes in a delicious natural raspberry flavor. The chewable micro tablets dissolve quickly and are lab tested for potency, purity, and identity.
The K2 MK-7 supp is vegan and lactose and gluten-free. The supplement claims to help improve bone formation and cardiovascular function. Each serving of KAL Vitamin K2 delivers 100 mcg of MK-7.
Who Should Buy KAL Vitamin K2 MK-7?
- People who like flavored chewable vitamin tablets.
Who Should Not Buy KAL Vitamin K2 MK-7?
- Folks who want an MK-4 supp.
KAL Vitamin K2 MK-7 Coupon
KAL Vitamin K2 MK-7 Coupon
Unflavored vitamin supplements can be boring. Consuming them every day can feel like a chore. However, KAL Vitamin K2 MK-7, with its natural raspberry flavor, shines in this department.
Best Third-Party Tested
Many companies spike their formulas with fillers to put impressive numbers on the labels. However, third-party testing guarantees what is mentioned on the label is what you’re getting inside the box.
InnovixLabs Full Spectrum Vitamin K2
InnovixLabs prides itself on its transparency and third-party testing practices. It is one of the few brands that mentions lot number, product expiration dates, and the name of the third-party testing lab on its label. It is no surprise that the product has more than 4,000 five-star reviews on Amazon.
Each InnovixLabs Full Spectrum Vitamin K2 bottle contains 90 capsules and costs $22.99. A serving delivers 500 mcg of MK-4 and 100 mcg of MK-7.
Who Should Buy InnovixLabs Full Spectrum Vitamin K2?
- Folks who only buy a third-party tested product.
- People who want an effectively dosed K2 formula.
Who Should Not Buy InnovixLabs Full Spectrum Vitamin K2?
- People who want D3 in their K2 supp.
InnovixLabs Full Spectrum Vitamin K2 Coupon
InnovixLabs Full Spectrum Vitamin K2 Coupon
InnovixLabs Full Spectrum Vitamin K2's transparent labeling and third-party testing make it a highly-rated, crowd-favorite vitamin K supplement.
What is Vitamin K2?
Experts believe that vitamin K2 plays an essential role in many aspects of your health, and its deficiency can lead to several chronic diseases.
Vitamin K was discovered in 1929 as an essential nutrient for blood coagulation—a scientific term for blood clotting. A German scientific journal called it “Koagulationsvitamin,” and that’s where the K in vitamin K comes from. [1]
Vitamin K refers to a family of fat-soluble vitamins that the body needs to produce a protein called prothrombin, which promotes blood clotting and regulates bone metabolism.
There are two main forms of vitamin K:
- Vitamin K1 (phylloquinone): found in plant foods like leafy greens
- Vitamin K2 (menaquinone): found in animal foods and fermented foods
There are many different subtypes of vitamin K2. However, MK-4 and MK-7 are the most popular.
Both vitamins K1 and K2 ensure healthy blood clotting, preventing excessive bleeding and bruising when blood vessels get injured. They can also improve calcium metabolism and heart health.
The foods high in vitamin K2 include—kale, collard greens, butter, sauerkraut, beef liver, legumes, cheese, egg yolks, and chicken.
What to Look For in a Vitamin K2 Supplement
Here are the things you should keep in mind while buying a vitamin K2 supplement:
- Ingredients: While purchasing a K2 supplement, you need to assess if you need an MK-4, MK-7, D3 supplement, or a product that combines everything.
- Form: K2 supps are available in capsule, tablet, and liquid forms; you should pick the one that suits your lifestyle the best.
- Brand: Buying from a reputable brand ensures quality.
- Dosages: K2 products come in varying doses, and you should pick a supplement that fits your requirements.
How We Ranked the Best Vitamin K2 Supplements
We used the following criteria to pick the best vitamin K2 supps:
- Third-Party Testing: Since the vitamin K2 ingredient list is rather straightforward, we prefer a third-party tested product to ensure quality.
- Value: We looked at each supplement’s ingredient list, number of servings, serving size, and overall effects to judge if it is worth spending your hard-earned money on.
Benefits of Vitamin K2 Supplements
One of vitamin K2’s most important functions is to regulate calcium deposition. It promotes bone calcification (hardening of soft tissue) and prevents calcification of blood vessels and kidneys.
The benefits of supplementing with vitamin K2 include:
Improve dental health
Osteocalcin is one of the primary proteins that help regulate dental health and bone metabolism. Studies suggest vitamin K2 consumption can aid in activating the protein. [2]
Research has found that osteocalcin stimulates the growth of new bone and dentin, which is the calcified tissue underneath the enamel of your teeth. [3]
Improves bone health
Vitamin K2 is crucial in the metabolism of calcium—the main mineral found in your bones and teeth. Furthermore, K2 activates the calcium-binding actions of matrix GLA protein and osteocalcin, which help build and maintain bones. [4]
Might help prevent heart disease
Vitamin K can help prevent calcium build-up in your arteries, significantly reducing your risk of heart-related issues. [5]
A 2004 study found that people supplementing with vitamin K2 were 52 percent less likely to develop artery calcification and had a 57 percent lower risk of dying from heart disease. [6]
Might help fight cancer
Two studies have concluded that vitamin K2 can reduce liver cancer recurrence and increase survival times by slowing or stopping cancer cell activity. [7][8]
Notably, these studies focused on certain cancers like liver and prostrate, and more research is needed on the subject.
Can help combat anxiety and depression
High blood glucose levels may increase a person’s risk of developing depression, anxiety, and cognitive impairment. A 2016 study conducted on rats found that vitamin K normalized blood glucose and reduced symptoms of anxiety and depression. [9]
Safety and Recommended Dosage of Vitamin K2 Supplements
The Office of Dietary Supplements (ODS) recommends a daily intake of 120 micrograms (mcg) of vitamin K for adult males and 90 mcg for adult females. However, there is no specific recommendation for vitamin K2.
45 mg of vitamin K2 has been safely used daily for up to two years. It’s usually well-tolerated, but some people might get an upset stomach or diarrhea.
FAQs
Is vitamin K2 more important than other vitamins A, B, C, and D?
Vitamin A supports immune systems and vision; B improves energy metabolism; C and D play massive roles in soft tissue and bone health, and organ function; K can improve bone and dental health, prevent heart disease, helps fight cancer, and combat anxiety and depression. So, each vitamin has its role and place in your diet.
How much vitamin K2 should I take in a day?
Studies found that 45 mcg of vitamin K2 can be used daily for a couple of years without any side effects. However, more research is needed to determine the optimal dosage.
Should I take a vitamin K2 supplement?
Most people cannot meet the recommended daily K2 requirement through their whole food diet. Supplementing with vitamin K2 is a convenient way to ensure you’re not lagging in the micronutrient.
Wrapping Up
Vitamin K refers to structurally similar, fat-soluble vitamers found in foods and marketed as dietary supplements. It is required for post-synthesis modification of certain proteins for blood coagulation or for controlling calcium binding in bones and other tissues. However, it is one of the most underrated and overlooked vitamins in our diet.
Sports Research Vegan Vitamin D3 + K2 Supplement is our top pick for the best vitamin K2 supplement on the market as it delivers high-quality ingredients in potent dosages and comes at a reasonable price.
References
- Newman, P., Shearer, M.J. (1998). Vitamin K Metabolism. In: Quinn, P.J., Kagan, V.E. (eds) Fat-Soluble Vitamins. Subcellular Biochemistry, vol 30. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1789-8_19
- Akbari S, Rasouli-Ghahroudi AA. Vitamin K and Bone Metabolism: A Review of the Latest Evidence in Preclinical Studies. Biomed Res Int. 2018 Jun 27;2018:4629383. doi: 10.1155/2018/4629383. PMID: 30050932; PMCID: PMC6040265.
- Mortada I, Mortada R. Dental pulp stem cells and osteogenesis: an update. Cytotechnology. 2018 Oct;70(5):1479-1486. doi: 10.1007/s10616-018-0225-5. Epub 2018 Jun 25. PMID: 29938380; PMCID: PMC6214857.
- Eden RE, Coviello JM. Vitamin K Deficiency. 2022 Jul 4. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan–. PMID: 30725668.
- Theuwissen E, Smit E, Vermeer C. The role of vitamin K in soft-tissue calcification. Adv Nutr. 2012 Mar 1;3(2):166-73. doi: 10.3945/an.111.001628. PMID: 22516724; PMCID: PMC3648717.
- Geleijnse JM, Vermeer C, Grobbee DE, Schurgers LJ, Knapen MH, van der Meer IM, Hofman A, Witteman JC. Dietary intake of menaquinone is associated with a reduced risk of coronary heart disease: the Rotterdam Study. J Nutr. 2004 Nov;134(11):3100-5. doi: 10.1093/jn/134.11.3100. PMID: 15514282.
- Mizuta T, Ozaki I, Eguchi Y, Yasutake T, Kawazoe S, Fujimoto K, Yamamoto K. The effect of menatetrenone, a vitamin K2 analog, on disease recurrence and survival in patients with hepatocellular carcinoma after curative treatment: a pilot study. Cancer. 2006 Feb 15;106(4):867-72. doi: 10.1002/cncr.21667. PMID: 16400650.
- Ishizuka M, Kubota K, Shimoda M, Kita J, Kato M, Park KH, Shiraki T. Effect of menatetrenone, a vitamin k2 analog, on recurrence of hepatocellular carcinoma after surgical resection: a prospective randomized controlled trial. Anticancer Res. 2012 Dec;32(12):5415-20. PMID: 23225445.
- Gancheva SM, Zhelyazkova-Savova MD. Vitamin K2 Improves Anxiety and Depression but not Cognition in Rats with Metabolic Syndrome: a Role of Blood Glucose? Folia Med (Plovdiv). 2016 Dec 1;58(4):264-272. doi: 10.1515/folmed-2016-0032. PMID: 28068285.
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