Best Vitamin K2 Supplements of 2026

Pure Encapsulations is the clean-label option we reach for when someone wants a premium D3 + K2 capsule and does not need a megadose. It delivers 4,000 IU of D3 per capsule, which sits between the 1,000 IU budget combos and the 5,000 IU formulas here, and the 120-count bottle is a four-month supply at one a day.

The formula is free from common allergens, artificial ingredients, and GMOs, and the capsule is small enough to take without drama. We like that the bottle is long enough to judge whether it fits your routine, and that the 4,000 IU D3 dose leaves room to adjust other products rather than locking you into the highest dose on the shelf.

The frustration is clarity: the K2 form and dose are not called out as plainly as they are on the Sports Research bottle, so if MK-7 is non-negotiable, check the label before ordering. That is a small annoyance rather than a dealbreaker. The allergen-free positioning and the mid-range D3 dose are why this one stays on our list.

Full-spectrum is the reason to choose InnovixLabs: this softgel carries both MK-4 and MK-7, the two K2 forms that show up in different dosing routines. The total is 600 mcg of K2 per softgel, which is much higher than the 90-100 mcg MK-7 picks here, so dose matters.

We like the convenience of not choosing between forms. MK-4 has a shorter half-life and is often split across the day; MK-7 lasts longer and is easier to take once daily. Putting both in one small softgel is a sensible shortcut for someone who has already decided they want full-spectrum coverage, and the batch-level third-party testing is a plus.

The caveat is that 600 mcg is a total, not 600 mcg of MK-7. If you are comparing labels, check the MK-4 and MK-7 breakdown before assuming this is a mega-dose of the long-acting form. The 90-count bottle is also shorter than the bulk picks, so the higher upfront cost buys fewer servings.

If you already have a D3 you like, the Sports Research K2 MK-7 is the cleanest way to add K2 without changing your D3 dose. Each small softgel supplies 100 mcg of MK-7 from fermented chickpeas, suspended in coconut MCT oil.

We appreciate that the formula is vegan-certified and Non-GMO Project Verified, and that the K2 source is chickpea rather than soy. The softgel is easy to swallow and has no aftertaste, which is the sort of detail that decides whether a K2-only bottle actually gets used.

The trade-off is cost and commitment: this is a premium K2-only bottle, and it does nothing for your D3 intake. That is fine if you are deliberately stacking. The 120-count bottle lasts about four months at one a day, which takes some of the sting out of the upfront price.

This is the combo we point to when budget is the first filter and a lower D3 dose is a better fit. Each capsule gives 1,000 IU of D3 and 45 mcg of K2, a gentler pairing than the 4,000-5,000 IU D3 and 90-100 mcg K2 formulas that dominate this set.

The 120-count bottle is a four-month supply at one a day, and the capsules are small. We like this one for someone who wants to try a D3 + K2 combo without starting at a high D3 dose, or who already gets some D3 from a multivitamin and wants a small top-up.

The trade-off is the dose. 45 mcg of K2 is the lowest among the combo picks here, and the label does not name the K2 form as clearly as the MK-7 products do. That is not a reason to avoid it if the dose suits you, but it is why we keep it as a budget alternative rather than the default for someone who wants a straightforward 100 mcg MK-7.

The 360-count bottle is the first thing you notice, and it is the reason this one earns a place: at one capsule a day, it is roughly a year of D3 and MK-7 without a reorder.

The formula is straightforward D3 plus K2 as MK-7, and it is lab-tested, non-GMO, gluten-free, and soy-free. We like it for a household that already knows it tolerates D3 and MK-7 and wants to stop thinking about restocking. The capsules are not oversized, which helps when you are taking them every day.

What gives us pause is stomach tolerance. Nausea and stomach ache can happen with a new D3/K2 supplement, so a smaller bottle is the smarter first step if you are sensitive. The large bottle is a commitment, and it is the main reason this stays a bulk pick rather than our default.

MK-4 is the reason to look at this bottle. It is a single-form K2 supplement with 100 mcg of MK-4 per vegan capsule, not the MK-7 that most of the picks here use.

The formula is simple, the capsule is small, and the 100-count bottle is inexpensive for a single-form K2. That makes it a useful add-on if you already take MK-7 and want to experiment with MK-4, or if you have specifically settled on MK-4 as your form.

The catch is dosing rhythm. MK-4 has a shorter half-life than MK-7, so some routines split it across the day; if you do, the 100-count bottle goes faster than the number suggests. That is not a flaw in the product so much as a reason to match the bottle to the way you plan to take it.

We keep this as a niche pick, not a default, because most readers are better served by a once-daily MK-7 formula. If MK-4 is what you want, this is a straightforward, low-cost way to get it without a blended product.

The label is as simple as it gets: MK-7 is the only active ingredient, 100 mcg per softgel, and the bottle holds 240 of them.

That makes this the no-frills K2-only pick. The softgels are small and easy to swallow, and 240 at one a day is about eight months. We like it for someone who already has a D3 routine and wants a long, low-cost supply of MK-7 without a branded blend to think about.

The trade-off is commitment. A 240-count bottle is a lot to buy before you know whether K2 fits your routine, and the formula gives you no D3. If you are still assembling a stack, a smaller combo bottle is easier to start with.

If you have already landed on MK-7, this is the bulk buy we reach for. It is not the most sophisticated formula here—no added cofactors—but it is a clean, single-ingredient way to keep K2 in the routine without rebuying every few months.