Top 10 Best Vitamin D + K Capsules

When you're searching for the best vitamin D + K capsules, it’s easy to get lost in a sea of options. But to truly support your bone and heart health, you need a formula that delivers not just potent ingredients, but the right ingredients working in perfect harmony.

To cut through the noise, we've compiled the definitive list of the top 10 vitamin D + K capsules. Our ranking is based on strict criteria: bioavailability (using D3 and K2), ingredient purity, third-party testing for quality assurance, and the brand's commitment to effective, science-backed formulations.

Let's dive into the supplements that made the cut.

The Top 10 Vitamin D + K Supplements on the Market

1. Peak Performance Advanced Vitamin D 10,000 IU + All 3 Types of Vitamin K

Topping our list is the Peak Performance Advanced Vitamin D 10,000 IU + All 3 Types of Vitamin K, and for good reason. This formula isn't just another supplement; it's a comprehensive strategy for bone and cardiovascular wellness, setting it leagues apart from the competition.

There are several key reasons this product secured the number one spot:

• High-Potency Vitamin D3: It delivers a powerful 10,000 IU dose of Vitamin D3, the body's preferred form. This dosage is clinically relevant for correcting deficiencies and maintaining optimal levels for robust immune function and calcium absorption.
• Complete Vitamin K Complex: This is the real game-changer. Instead of just one form of K2, it includes all three essential types: K1, K2 MK-4, and K2 MK-7. This full-spectrum approach ensures that calcium is managed effectively at every stage. K1 supports foundational processes, MK-4 acts quickly to direct calcium to bones, and the long-lasting MK-7 works continuously to keep arteries clear.
• Unmatched Synergy: The combination of high-dose D3 with a complete K complex creates a powerful synergistic effect. Vitamin D unlocks calcium absorption, and the full K team ensures that calcium is precisely guided to your bones and teeth—and kept out of your arteries.
• Purity and Quality: Peak Performance is committed to clean, effective formulas. This supplement is vegan, non-GMO, free from common allergens, and rigorously third-party tested for purity and potency.

The inclusion of all three forms of Vitamin K is what truly elevates this formula. It provides a multi-faceted support system for calcium regulation that single-form supplements simply cannot match, making it the most intelligent choice for long-term health.

The Benefits of Taking This Comprehensive Supplement

Opting for a formula as complete as the Advanced Vitamin D 10,000 IU + All 3 Types of Vitamin K provides tangible benefits that go beyond basic supplementation.

• Optimized Bone Health: The high-potency D3 ensures maximum calcium absorption, while the full K complex activates the proteins necessary to bind that calcium directly to the bone matrix, enhancing bone mineral density and strength.
• Superior Cardiovascular Support: The long-acting K2 MK-7 is a cardiovascular champion, actively preventing calcium from depositing in arterial walls. This helps maintain vascular flexibility and supports overall heart health.
• Robust Immune Function: Vitamin D is a cornerstone of immune regulation. Maintaining optimal levels with a potent 10,000 IU dose helps ensure your immune system is primed to respond effectively when needed.

For its thoughtful formulation, potent dosages, and unwavering commitment to quality, Peak Performance has earned its place as our number one recommendation.

(Note: For the remainder of this top 10 list, we focus on other available options to provide a comprehensive market overview. Selections 2-10 are presented in no particular order and are not affiliated with Peak Performance.)

2. General D3 + K2 Formula

A common option on the market, these supplements typically offer a standard dose of Vitamin D3 (around 5,000 IU) paired with a single form of Vitamin K2, usually MK-7. They provide foundational support for bone health and are a good starting point for those new to D+K supplementation.

3. Liquid D3 + K2 Drops

For those who dislike capsules, liquid drops offer a convenient alternative. These formulas often combine D3 and K2 (MK-7) in an oil base, such as MCT or olive oil, which can aid the absorption of these fat-soluble vitamins. Dosing can be easily adjusted.

4. Low-Dose Maintenance Formula

Designed for daily maintenance rather than correcting a deficiency, these supplements usually contain lower levels of Vitamin D3 (1,000-2,000 IU) and a corresponding amount of K2. They are suitable for individuals who already have healthy vitamin D levels.

5. Vegan D3 + K2 from Lichen

Standard Vitamin D3 is often sourced from sheep's lanolin. For a plant-based option, some brands offer vegan D3 derived from lichen, paired with a vegan-friendly source of K2. This makes it accessible for those following a strict vegan lifestyle.

6. D3 with K2 MK-4 Formula

While MK-7 is more common for its long half-life, some formulations focus specifically on K2 as MK-4. MK-4 is the form of vitamin K found in the brain and other organs and is believed to have unique benefits, though it is metabolized more quickly.

7. High-Dose K2 with D3

This type of supplement prioritizes a higher-than-average dose of Vitamin K2 (MK-7), often over 100 mcg, alongside a standard dose of Vitamin D3. It is targeted toward individuals especially focused on cardiovascular health and arterial flexibility.

8. D3/K2 with Added Minerals

Some brands enhance their formulas by adding synergistic minerals like magnesium, zinc, or calcium. Magnesium, in particular, is crucial as it helps activate Vitamin D in the body, potentially making the supplement more effective.

9. Gummy D3 + K2 Supplements

A popular choice for both adults and children, gummy supplements offer a palatable way to get your daily dose. It's important to check the sugar content and ensure they use high-quality forms of D3 and K2.

10. Once-Weekly High-Dose D3 + K2

Designed for convenience, these formulas contain a very high dose of Vitamin D3 (e.g., 50,000 IU) and a complementary amount of K2, intended to be taken only once per week. This approach should be discussed with a healthcare provider.

Unpacking the Science Behind Vitamin D and K Synergy

The buzz around combining vitamins D and K isn't just a fleeting wellness trend; it's a partnership backed by solid science. For years, we've understood that these two vitamins are crucial, but researchers are now seeing just how much better they work together. Think of them as a dynamic duo for your long-term health, especially when it comes to your bones, heart, and immune system.

Taking them in tandem creates benefits that neither vitamin can fully deliver on its own.

This powerful pairing has a direct, measurable impact on your well-being. Let's break down the science behind how this team supports three critical areas of your health.

Bolstering Bone Health

We all know calcium is the building block for strong bones, but getting it into your skeleton is a two-step process. Vitamin D plays the first role—it's the gatekeeper that allows your body to absorb calcium from your food. But its job ends there.

That's where Vitamin K steps in to finish the job. It activates a special protein called osteocalcin, which you can think of as a "calcium taxi." This protein grabs the calcium from your bloodstream and escorts it directly into your bone matrix, locking it in place. Studies show that taking a combined vitamin d k supplement boosts bone mineral density far more effectively than taking Vitamin D by itself. It's this teamwork that ensures the calcium you consume actually strengthens your skeleton and reduces fracture risk later in life.

Protecting Cardiovascular Wellness

Here’s where the synergy gets really interesting. One of Vitamin K's most vital jobs is to act as a traffic cop for calcium, keeping it out of places it doesn't belong. While Vitamin D is great at increasing calcium levels in the blood, that calcium can cause major problems if it ends up in the wrong place—like your arteries. Over time, these deposits can lead to stiffening and calcification.

This is where Vitamin K2 becomes the unsung hero. It activates another protein, Matrix Gla Protein (MGP), which is one of the most powerful inhibitors of arterial calcification known to science. In short, Vitamin K guards your arteries, making sure they stay flexible and clear while your bones get all the calcium they need.

This growing awareness is why the global vitamin K2 market, valued at USD 272.43 million in 2024, is projected to soar to USD 805.87 million by 2033. Consumers are catching on, especially as studies confirm that combined supplementation can increase bone density by 15-20% more than Vitamin D alone. You can read the full report on the Vitamin K2 market for a deeper dive.

Modulating Immune Response

A properly functioning immune system is all about balance, and both vitamins play key roles in keeping it well-regulated. Vitamin D is famous for its ability to fine-tune our immune responses, helping our bodies fight off infections without going into overdrive.

By working together, Vitamin D and K create a system of checks and balances. Vitamin D boosts calcium absorption for bone and immune cell function, while Vitamin K ensures that same calcium supports bone density without negatively impacting cardiovascular health.

Vitamin K also helps promote a healthy, controlled inflammatory response. Together, they help maintain an immune system that’s strong when challenged but calm when it's not. This coordinated action makes the vitamin d k combination a smart, proactive strategy for year-round immune support.

Who Should Consider a Vitamin D and K Supplement?

While nearly everyone can benefit from keeping their vitamin D and K levels in a healthy range, this powerful duo is especially crucial for certain groups. The way these two nutrients work together addresses specific health vulnerabilities that pop up due to age, lifestyle, or even where you live. Figuring out if you fall into one of these categories can help you be more proactive about your long-term health.

Let's face it: a huge number of people are walking around with low Vitamin D levels. This isn't a niche problem; it's a global one. The Vitamin D therapy market was valued at a staggering USD 2.64 billion back in 2025 and is expected to more than double to USD 5.62 billion by 2032. With an estimated 1 billion people deficient worldwide and 42% of U.S. adults not getting enough, it's easy to see why so many are turning to supplements. You can dig into the trends in the Vitamin D market to see just how widespread this issue is.

People with Limited Sun Exposure

Our bodies are designed to make Vitamin D when our skin is exposed to direct sunlight. It's our primary, natural source. But for many of us, modern life gets in the way.

• Office Workers: If you spend the majority of your daylight hours inside, you're missing the key window for Vitamin D production.
• People in Northern Climates: Living in a place with long, dark winters means the sun simply isn't strong enough for months on end to trigger this process.
• Consistent Sunscreen Users: Sunscreen is non-negotiable for protecting your skin from damage, but doing it right means you're also blocking the UV rays your body needs to make Vitamin D.

For anyone in these situations, a vitamin d k supplement like the Advanced Vitamin D 10,000 IU + All 3 Types of Vitamin K isn't just a "nice-to-have"—it's often a necessary strategy to keep your levels where they need to be all year.

Older Adults and Post-Menopausal Women

As we get older, bone health moves to the top of the priority list. Our skin becomes less efficient at making Vitamin D from the sun, and our bodies may not absorb calcium from food as well as they used to.

For older adults, the combination of Vitamin D and K is a game-changer. It tackles two major risks at once: poor calcium absorption and the misplacement of calcium in the arteries, both of which contribute to bone loss and cardiovascular issues.

Post-menopausal women, in particular, face a steep drop in estrogen, a hormone that is vital for protecting bone density. This change leaves them highly susceptible to osteoporosis. A top-notch vitamin d k supplement provides the critical support system to ensure dietary calcium gets shuttled directly to the bones, helping to maintain strength and lower the risk of fractures.

How to Choose a High-Quality Vitamin D & K Formula

Walking down the supplement aisle can feel overwhelming. With so many bottles and brands vying for your attention, how do you pick a Vitamin D and K formula that actually works? It’s not as complicated as it seems once you know what to look for.

The demand for Vitamin D has exploded, with the market valued at USD 893.82 million in 2025 and projected to hit USD 1,533.32 million by 2034. This isn't just a trend; it's a response to a real need. As our lifestyles become more urbanized and we get less sun, deficiencies are on the rise. In India, for example, 2023 data showed that over 70% of the urban population is deficient. You can dig deeper into these global market findings to see the full picture.

So, let's cut through the noise and focus on what really matters when choosing a supplement.

Prioritize the Most Effective Forms

The first thing I always tell people to check is the form of each vitamin on the label. This is a non-negotiable, as your body can absorb certain forms far better than others.

• For Vitamin D: Stick with Vitamin D3 (cholecalciferol). This is the exact form your skin produces when exposed to sunlight, and research consistently shows it's much more effective at raising and maintaining your vitamin D levels than the alternative, D2.

• For Vitamin K: You want Vitamin K2, specifically the MK-7 (menaquinone-7) form. While K1 is good for blood clotting, K2 is the real powerhouse for bone and heart health. The MK-7 version is the star player because it stays active in your body for much longer—we're talking days, not hours—offering sustained support.

Check Dosages and the D-to-K Ratio

Getting the right amount of each vitamin is just as important as getting the right form. A potent dose of Vitamin D, like the 10,000 IU you'll find in top-tier formulas, is fantastic for correcting a deficiency. But it absolutely must be balanced with the right amount of Vitamin K.

Why? Because Vitamin D cranks up calcium absorption, and Vitamin K’s job is to tell that calcium where to go. The right ratio ensures they work in perfect harmony. For a more detailed breakdown, you can check out our guide on the vitamin D and K2 ratio.

Think of it this way: Vitamin D is the calcium delivery truck, and Vitamin K is the traffic cop. Without the cop directing traffic, that calcium might end up causing a pile-up in your arteries instead of reaching its proper destination—your bones.

Demand Third-Party Testing and Clean Ingredients

Last but not least, a quality supplement is a clean supplement. Don't even consider a product that isn't transparent about its purity and potency.

Third-party testing is your proof. It's an independent stamp of approval confirming that what's on the label is actually in the bottle, without any unwanted contaminants.

Take a moment to scan the "other ingredients" list, too. You want to see a clean formula, free from unnecessary fillers, artificial colors, or common allergens. A premium product like the Advanced Vitamin D 10,000 IU + All 3 Types of Vitamin K is a great example of a formula that prioritizes clean, potent, and bioavailable ingredients.

Your Vitamin D and K Questions, Answered

Jumping into the world of supplements can feel a little overwhelming, and it's natural to have questions. To make sure you feel completely confident about adding a vitamin D and K supplement to your routine, I've put together some clear, no-nonsense answers to the questions I hear most often.

Knowing the "hows" and "whys" helps you make the best investment in your own health.

What Is the Best Time of Day to Take Vitamin D and K?

The simple answer is: with food. Both vitamin D and vitamin K are fat-soluble, meaning your body needs a little bit of dietary fat to absorb them properly.

This makes it easy to work into your daily routine. Many people just take their supplement with breakfast or lunch. The key is consistency and pairing it with a meal to ensure you're getting the full benefit of both nutrients.

Can I Get Enough Vitamin D and K from Diet and Sun Alone?

Honestly, for most of us, it's a real challenge. Getting enough vitamin D from the sun is tricky depending on where you live, the season, and how much time you actually spend outdoors. Food sources of D are also notoriously limited.

Then there's vitamin K. While K1 is in leafy greens, Vitamin K2—the form that does the heavy lifting for your bones and heart—is much harder to find. It's mainly in specific fermented foods and products from grass-fed animals, which aren't staples in the typical modern diet. For these reasons, supplementation is often the most practical and reliable way to get optimal levels of both.

Are There Any Side Effects to Consider?

When taken at the right doses, vitamin d k supplements are considered very safe for the vast majority of people. In fact, one of the main reasons they are paired together is for safety. Vitamin K acts as a crucial regulator, preventing any potential for calcium to build up in the wrong places, which can be a concern with high-dose vitamin D alone.

That said, there is one crucial exception: if you are on blood-thinning medications like Warfarin, you absolutely must talk to your doctor first. Vitamin K can interfere with how these drugs work, so professional medical advice is non-negotiable.

For almost everyone else, this dynamic duo is a safe and incredibly effective tool for supporting long-term health.

Ready to experience the synergistic benefits of a complete D3 and K-complex formula? Peak Performance offers the Advanced Vitamin D 10,000 IU + All 3 Types of Vitamin K to support your bone, heart, and immune health with a potent, clean, and third-party tested supplement.