10 Best Vitamin K2 Supplements of 2026 (MK-7, MK-4 and D3)

Start with the form and the dose, not the biggest number on the bottle. A plain 100 mcg MK-7 capsule, an MK-4 blend and a high-dose D3+K2 softgel are different purchases. The right choice depends on what you already take and whether a supplement fills an actual gap.

Editorial review by Tom Miller, CSCS.

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How We Chose

We compared the vitamin K forms, amount per serving, added vitamin D, bottle count, capsule ingredients and delivery format. A larger dose or more forms does not automatically earn a better recommendation. The useful differences are whether you want K2 alone, whether you can swallow capsules, and whether the formula duplicates another supplement. Our ratings reflect those purchasing distinctions.

We kept separate roles for plain MK-7, MK-4, blended vitamin K and D3+K2. The NIH Office of Dietary Supplements notes that research has not established that vitamin K supplementation prevents osteoporosis or cardiovascular disease. A bottle is not a treatment plan.

Our Top Picks

Best MK-4 and MK-7 Blend: InnovixLabs Full Spectrum Vitamin K2

InnovixLabs Full Spectrum Vitamin K2

Best Overall Blend

★★★★★ 4.8/5

A clearly specified blend of MK-4 and MK-7 in a 90-capsule bottle, for buyers who want both forms without adding vitamin D.

Pros

• 500 mcg MK-4 plus 100 mcg MK-7 per capsule
• 90 capsules per bottle
• No added vitamin D

Cons

• Gelatin capsule is not vegan
• Not needed just to obtain a plain 100 mcg MK-7 serving

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InnovixLabs lists 500 mcg MK-4 and 100 mcg MK-7 per capsule. That separation is more useful than the combined 600 mcg headline: it tells you exactly what the blend contains. The 90-capsule bottle also makes supply comparisons straightforward.

This is our blended-K2 pick, not proof that combining forms works better than MK-7 alone. Skip it if you want a vegan capsule or only need a simple MK-7 product. Doctor’s Best and NOW are better matches for that narrower brief. InnovixLabs uses gelatin, despite the plant-derived oils elsewhere in the formula.

Best D3+K2 Softgel: Sports Research Vitamin D3+K2

Sports Research Vitamin D3+K2

Best D3+K2 Softgel

★★★★★ 4.7/5

A plant-based softgel pairing 100 mcg MK-7 with 5,000 IU vitamin D3, for adults whose clinician recommends that higher vitamin D amount.

Pros

• 100 mcg MK-7 with 125 mcg vitamin D3
• Plant-based softgel formulation
• 60 softgels in the selected bottle

Cons

• 5,000 IU D3 exceeds the general adult daily upper limit
• Cannot adjust D3 and K2 separately
• Duplicates standalone vitamin D supplements

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The linked Sports Research bottle contains D3 and K2 together, not pure MK-7. Each serving pairs 100 mcg K2 with 125 mcg, or 5,000 IU, vitamin D3. Its appeal is one-softgel convenience when both amounts match your plan. Coconut MCT oil is part of the formulation, so check ingredients if that matters to you.

Skip it if you already take D3 or want K2 alone. The D3 amount exceeds the general 4,000 IU daily adult upper limit described by NIH. A clinician may recommend higher amounts for a specific reason; that does not make this a routine starting dose for everyone.

Best Simple MK-7 Capsule: Doctor’s Best Natural Vitamin K2

Doctor's Best Natural Vitamin K2

Best Simple MK-7

★★★★★ 4.7/5

A 60-capsule MenaQ7 formula with 100 mcg MK-7 and no added vitamin D, for buyers who want a straightforward single-form supplement.

Pros

• 100 mcg MK-7 per capsule
• MenaQ7 ingredient
• 60 vegetarian capsules with no added D3

Cons

• Only MK-7, not an MK-4 blend
• Smaller supply than Nutricost's 240-capsule MK-4 bottle

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Doctor’s Best is the cleaner fit when your shopping list says 100 mcg MK-7, nothing more. The selected bottle contains 60 vegetarian capsules and uses the branded MenaQ7 ingredient. You are not paying for a D3 combination you may already have.

Compare its current cost per capsule with NOW’s equivalent 100 mcg, 60-count format. Brand preference and the remaining ingredients are more useful tie-breakers than claims that one is an advanced longevity formula. Skip it if you need an MK-4 blend or a non-capsule format. MaryRuth’s and KAL cover those swallowing preferences better.

Best K1 and K2 Combination: Life Extension Super K

Life Extension Super K

Best Multi-K Formula

★★★★★ 4.6/5

A 90-softgel formula combining vitamin K1 with two K2 forms, for buyers who specifically want a multi-K supplement rather than MK-7 alone.

Pros

• Vitamin K1 plus MK-4 and MK-7
• 90 softgels in the selected bottle
• Distinct from a K2-only capsule

Cons

• Adds K1 when you may only want MK-7
• Less control over individual vitamin K forms

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Super K earns its place because it combines vitamin K1 with MK-4 and MK-7. It is not interchangeable with the plain MK-7 bottles beside it. Choose it only when that wider ingredient list is deliberate, and compare the full Supplement Facts panel rather than a combined vitamin K total.

The 90-softgel count is useful, but extra forms are not an automatic upgrade. Skip it if you want to keep K1 intake separate or adjust MK-7 on its own. Doctor’s Best is simpler; InnovixLabs gives you two K2 forms without K1. Neither comparison establishes superior clinical outcomes.

Best Plain-Formula Alternative: NOW MK-7 Vitamin K2

NOW MK-7 Vitamin K2, 100 mcg

Best Plain Alternative

★★★★★ 4.5/5

A 60-count vegetarian capsule with 100 mcg MK-7 and no vitamin D, suited to buyers comparing a straightforward alternative to Doctor's Best.

Pros

• 100 mcg MK-7 per veg capsule
• 60-capsule selected bottle
• No added D3

Cons

• Not a blended MK-4 and MK-7 formula
• Contains capsule excipients rather than vitamin K alone

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The exact linked NOW variant is MK-7, 100 mcg, 60 veg capsules. NOW also sells other vitamin K products, so match the form and amount before ordering. This is the useful direct comparison with Doctor’s Best, not with Nutricost’s MK-4.

NOW lists rice flour and other capsule ingredients alongside MK-7. That is not a reason to reject it, but it matters if you have a specific ingredient restriction. Skip it if you want drops, a dissolving tablet, or both K2 forms. Compare the two plain MK-7 bottles on current cost per serving rather than assuming a permanent budget winner.

Best Dedicated MK-4 Option: Nutricost Vitamin K2 MK-4

Nutricost Vitamin K2 MK-4

Best Dedicated MK-4

★★★★★ 4.5/5

A 240-capsule bottle of 100 mcg MK-4 without added D3, for shoppers who intentionally want MK-4 rather than a conventional MK-7 supplement.

Pros

• 100 mcg MK-4 per capsule
• 240 capsules in the selected bottle
• No added D3 or MK-7

Cons

• Not equivalent to high-dose MK-4 treatments studied clinically
• Wrong form if your plan specifically calls for MK-7

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Nutricost is the dedicated MK-4 choice here. Its 240-capsule bottle gives a much longer supply than the 60-count MK-7 products, but the form is different. Compare like with like when judging value.

The 100 mcg capsule should not be confused with the milligram-level MK-4 regimens used in some osteoporosis research. Those amounts and medical settings are not interchangeable with an over-the-counter product. Skip it if your clinician specified MK-7. A large bottle is only good value when it contains the ingredient you intended to buy, and a facility quality statement is not a sport-certification claim.

Best Larger D3+K2 Bottle: Bronson Vitamin K2 MK-7 with D3

Bronson Vitamin K2 MK-7 with D3

Best Larger Combo Bottle

★★★★☆ 4.4/5

A 120-capsule MK-7 and D3 combination, for shoppers who want a larger bottle and have checked that both labeled amounts suit their routine.

Pros

• MK-7 and D3 in one capsule
• 120 capsules in the selected bottle
• Larger bottle count than the 60-count Sports Research option

Cons

• D3 and K2 amounts cannot be adjusted independently
• Check total vitamin D across all supplements

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Bronson’s distinction is a 120-capsule D3+K2 bottle. That can reduce how often you reorder compared with a smaller bottle, but capsule count alone does not make two different doses equivalent.

Before choosing between this and Sports Research, compare vitamin D amount, K2 amount and serving size on the exact variant. Skip it if you want to adjust either nutrient separately. Plain MK-7 leaves your D3 decision independent. Do not treat a two-in-one bottle as an automatic recommendation for beginners, especially when another multivitamin or vitamin D product is already part of the routine.

Best Liquid Format: MaryRuth’s Organic K2 MK7 Drops

MaryRuth's Organic K2 MK7 Liquid Drops

Best Liquid Format

★★★★☆ 4.4/5

An unflavored, one-ounce organic MK-7 dropper bottle, for adults who prefer liquid supplements and are comfortable measuring the labeled serving each time.

Pros

• Unflavored MK-7 liquid
• USDA Organic one-ounce selected bottle
• Non-capsule option

Cons

• Requires measuring the labeled serving
• Dropper bottle is less convenient than tablets for some travel routines

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MaryRuth’s is the liquid alternative, not a better-absorbed version simply because it uses a dropper. The linked product is the one-ounce USDA Organic, unflavored K2 MK7 bottle. Check its directions rather than borrowing a drop count from a different MaryRuth’s product.

The current adult serving lists 100 mcg. Measuring that serving takes more attention than taking a single capsule. Skip it if you want the simplest travel format or expect a liquid to justify changing the amount yourself. KAL and Superior Source give non-standard tablet options without a dropper. For a child, ask their clinician instead of adapting an adult dose.

Best Flavored Microtablet: KAL Vitamin K2 MK-7 ActivMelt

KAL Vitamin K2 MK-7 ActivMelt

Best Flavored Microtablet

★★★★☆ 4.3/5

A raspberry ActivMelt microtablet with 100 mcg MK-7, for buyers who prefer a dissolving format over swallowing a capsule or measuring liquid drops.

Pros

• 100 mcg MK-7 per labeled serving
• Raspberry ActivMelt microtablet format
• 60 microtablets in the selected bottle

Cons

• Flavored format includes additional ingredients
• No reason to expect better outcomes than capsule MK-7

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KAL’s raspberry ActivMelt format is the reason to consider it. The 60-microtablet bottle lists 100 mcg MK-7, putting it in the same amount range as the plain capsule picks, but with a different delivery format.

Flavor preference and ingredient restrictions matter more than assuming that dissolving means superior absorption. Skip it if you want an unflavored product or the shortest ingredient list. NOW and Doctor’s Best are simpler capsule choices; MaryRuth’s is the unflavored liquid alternative. The format can make a routine easier, but it does not establish stronger health benefits.

Best MicroLingual Tablet: Superior Source Vitamin K2 MK-7

Superior Source Vitamin K2 MK-7

Best MicroLingual Tablet

★★★★☆ 4.2/5

A 60-count MicroLingual MK-7 tablet with a 100 mcg labeled amount, for shoppers who want a compact alternative to capsules and dropper bottles.

Pros

• 100 mcg MK-7 labeled amount
• 60 MicroLingual tablets
• Compact non-capsule format

Cons

• Check the complete ingredient list for dietary restrictions
• No demonstrated outcome advantage from tablet format alone

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Superior Source’s small MicroLingual tablets are a distinct alternative to KAL’s raspberry microtablets and MaryRuth’s drops. The linked bottle contains 60 tablets with a 100 mcg MK-7 labeled amount.

Choose it for the format, not a promise of faster or better results. Read the full ingredient list if dairy ingredients or other restrictions are relevant to you. Skip it if you are comfortable with ordinary capsules and the current cost per serving is higher than NOW or Doctor’s Best. There is no need to upgrade to a more complex formula just because this one is simple.

Comparison Table

How to Choose a Vitamin K2 Supplement

Separate MK-7, MK-4 and combined vitamin K

Read the form next to the amount. NOW, Doctor’s Best, KAL and Superior Source are MK-7 products. Nutricost is MK-4. InnovixLabs combines both, while Life Extension adds K1 as well. Do not compare the combined number on a blend with the MK-7 amount on a plain capsule and conclude that one is six times better. More forms also mean less freedom to adjust each independently.

Keep vitamin D a separate decision

Sports Research and Bronson contain D3 alongside K2. Count vitamin D from your multivitamin, standalone D3 and any other combination before adding another bottle. If a clinician changes your D3 amount, a fixed combination may no longer fit. See our D3+K2 comparison when both nutrients are the actual goal, rather than buying a combo just because it appears in a K2 roundup.

Compare servings, not just bottle counts

Divide the current bottle price by its labeled servings. A 240-count bottle can be attractive, but not if it contains the wrong form for your plan. With liquids, read the serving directions and bottle volume together. With blends, compare the individual K amounts. Check the current price before choosing a budget option: discounts and pack sizes can change which bottle costs less per serving.

Choose a format you can use consistently

A capsule is convenient when swallowing it is easy. Drops require measuring; dissolving tablets bring their own ingredients and flavor choices. There is no automatic absorption or health-outcome advantage attached to a more unusual format. If you follow a vegan diet, check the capsule material too: a plant-sourced active ingredient does not make a gelatin capsule vegan.

Do not turn a nutrient into a treatment claim

Bone health also involves resistance training, adequate energy, protein, calcium and vitamin D. A K2 supplement does not replace osteoporosis care or cardiovascular treatment. For exercise planning, start with our strength-training guide; for mineral options, compare our calcium supplements. Ask a clinician about a nutritional gap rather than trying to fix symptoms with a larger K2 dose.

Who Should Be Cautious?

Warfarin or a similar vitamin K antagonist: do not start, stop or change vitamin K supplements without your prescriber’s guidance. Changes in intake can alter anticoagulation. The NHS warfarin guidance explains why medication and supplement choices need review. Other anticoagulants work differently, so ask about your specific medicine rather than applying one rule to every blood thinner.

Seek advice first if you are pregnant, have a malabsorption condition, kidney disease, a diagnosed bone disorder or a complex medication routine. High-dose D3+K2 products need particular attention to total vitamin D. These adult product comparisons are not dosing instructions for children.

Frequently Asked Questions

Is MK-7 better than MK-4?

MK-7 has a longer circulating half-life, but that does not establish that every MK-7 product produces better clinical outcomes. Pick the form specified for your situation. Do not copy a clinical MK-4 regimen from a study onto a differently dosed over-the-counter capsule.

Does everyone need K2 with D3?

No. A fixed combination is a convenience choice when both ingredients and their amounts fit your needs. It is not evidence that every vitamin D user needs the same K2 supplement. Separate bottles make individual adjustments easier.

How much K2 should I take?

The U.S. adequate intakes of 90 mcg for adult women and 120 mcg for adult men apply to total vitamin K, not a universal K2 supplement prescription. Follow the product directions and discuss your needs, diet and medications with a clinician.

How soon will I notice a benefit?

K2 is not an acute workout supplement. A subjective change is not a reliable way to assess bone density or cardiovascular health. Do not promise yourself a result on a fixed timeline, and do not increase the dose because you cannot feel it working.

Bottom Line

InnovixLabs is our pick when you deliberately want both MK-4 and MK-7 without adding D3. Its 500 mcg and 100 mcg split is clear, and the 90-capsule bottle is easy to compare. Doctor’s Best or NOW makes more sense for plain 100 mcg MK-7; MaryRuth’s, KAL and Superior Source cover non-capsule preferences. Sports Research belongs in the D3+K2 category, not the pure-K2 slot. Match the formula to your needs, and review medication interactions before starting.

Sources

• NIH Office of Dietary Supplements: Vitamin K.
• NIH Office of Dietary Supplements: Vitamin D.
• NHS: Warfarin.