10 Best Vitamin D3 + K2 Supplements (2026) Reviewed
Vitamin D3 and K2 are two of the most important fat-soluble vitamins for maintaining strong bones, supporting cardiovascular health, and promoting proper calcium metabolism. While vitamin D3 helps your body absorb calcium, vitamin K2 ensures that calcium gets directed to your bones and teeth—not your arteries. Research suggests these vitamins work synergistically, making combination supplements increasingly popular among health-conscious consumers.
Finding the right D3+K2 supplement can be overwhelming given the dozens of options available. Factors like dosage, form (softgel vs. capsule vs. liquid), additional ingredients, and third-party testing all play a role in product quality. We researched over 30 products, consulted third-party reviews from sources like Healthline, Innerbody, and ConsumerLab, and verified product specifications to identify the 10 best vitamin D3+K2 supplements for various needs and budgets.
Whether you’re looking to correct a deficiency, maintain daily wellness, or find a vegan-friendly option, this guide covers the top choices available today.
Table of Contents
- Quick Comparison Table
- Best by Type/Form
- Product Reviews
- Buying Guide
- How to Take Vitamin D3+K2
- Potential Benefits
- Safety Considerations
- FAQ
- Bottom Line
Quick Comparison Table
| Product | Form | Serving Size | Key Differentiator | Best For | Winner |
|---|---|---|---|---|---|
| Sports Research D3+K2 | Softgel | 1 softgel | Vegan D3 from lichen, coconut oil base | Vegans, quality-conscious buyers | 🏆 TOP PICK |
| NOW Foods D-3 & K-2 | Capsule | 1 capsule | Low-dose maintenance, highly affordable | Budget buyers, daily maintenance | 🥇 Best Budget |
| Pure Encapsulations D3 & K2 | Capsule | 1 capsule | Hypoallergenic, third-party tested | Sensitive individuals, premium seekers | 🥇 Best Premium |
| Thorne D+K2 Liquid | Liquid | 2 drops | 600 servings per bottle, adjustable dosing | Pill-averse, customizable dosing | 🥇 Best Liquid |
| Bronson K2+D3 | Capsule | 1 capsule | 250-count bottle, trusted since 1960 | Value seekers, long-term use | 🥇 Best Value |
| Micro Ingredients D3 10,000 IU + K2 | Softgel | 1 softgel | High potency 10,000 IU, 300-count pouch | Deficiency correction, high-dose needs | 🥇 Best High Potency |
| Dr. Berg D3 K2 5000 | Capsule | 1 capsule | Added magnesium, B6, zinc, MCT oil | Comprehensive support | 🥇 Best with Cofactors |
| Nature Made D3 K2 | Softgel | 1 softgel | #1 pharmacist recommended brand | Brand trust, pharmacy availability | 🥇 Most Trusted Brand |
| Solaray D3+K2 | VegCap | 1 capsule | Vegetarian capsule, K2 from chickpea | Vegetarians, soy-free needs | 🥇 Best Vegetarian |
| Metagenics D3 5000+K | Softgel | 1 softgel | Professional-grade, 60-day guarantee | Healthcare practitioner recommended | 🥇 Best Professional Grade |
Best by Type/Form
Softgels
Softgels are the most popular form for D3+K2 supplements because vitamins D and K are fat-soluble, meaning they absorb better when delivered in an oil base. Softgels typically contain MCT oil, olive oil, or coconut oil to enhance bioavailability. They’re easy to swallow and often smaller than capsules. Best for: most users seeking optimal absorption.
Vegetarian/Vegan Capsules
Traditional D3 comes from lanolin (sheep’s wool), but vegan options derived from lichen are now widely available. Vegetarian capsules use plant-based cellulose shells rather than gelatin. These may absorb slightly less efficiently without an oil carrier, though many brands add coconut oil to compensate. Best for: vegans, vegetarians, and those avoiding animal products.
Liquid Drops
Liquid supplements offer precise dose customization and are ideal for people who have difficulty swallowing pills. They typically provide the best value per serving and allow you to add drops directly to food or beverages. Best for: children, elderly individuals, those who dislike pills, or anyone needing flexible dosing.
Capsules with Cofactors
Some D3+K2 supplements include additional nutrients like magnesium, zinc, or boron that may enhance vitamin D metabolism and utilization. These comprehensive formulas can simplify supplement routines but may require attention to total daily intake of each nutrient. Best for: those seeking all-in-one solutions or with known cofactor deficiencies.
Product Reviews
Sports Research Vitamin D3 + K2 — Best Overall
This vegan-certified supplement combines plant-based D3 from lichen with K2 derived from fermented chickpeas, all in a coconut MCT oil base for optimal absorption—making it our top pick for most people.
Sports Research has built a strong reputation for quality and transparency. Their D3+K2 supplement stands out as the only Non-GMO Project Verified, vegan, soy-free, and gluten-free option in its category. Each softgel delivers 5,000 IU (125 mcg) of vitamin D3 alongside 100 mcg of vitamin K2 as MK-7, the most bioavailable form of K2.
The company subjects every batch to third-party testing and manufactures in a cGMP-compliant facility in the USA. The small, easy-to-swallow veggie softgels have earned praise from reviewers and dietitians alike. Sports Research also offers lower-dose versions (2,500 IU) for those who prefer more moderate supplementation.
Key Specifications:
- Vitamin D3: 5,000 IU (125 mcg) per softgel
- Vitamin K2: 100 mcg as MK-7
- Form: Veggie softgel with coconut MCT oil
- Count: 60 softgels
- Certifications: Vegan Certified, Non-GMO Project Verified
- Third-party tested: Yes
Considerations: The 5,000 IU dose may be higher than some people need for daily maintenance; those with adequate vitamin D levels may prefer the 2,500 IU version.
NOW Foods Vitamin D-3 & K-2 — Best Budget
At just pennies per serving with 120 capsules per bottle, NOW Foods delivers a clinically studied 1,000 IU dose ideal for daily maintenance without breaking the bank.
NOW Foods has been a family-owned supplement company since 1968, and their D-3 & K-2 formula exemplifies their commitment to affordable quality. Each capsule provides 25 mcg (1,000 IU) of vitamin D3 and 45 mcg of vitamin K2 as MK-4—a ratio supported by research for general population health maintenance.
The product is manufactured in NOW’s own GMP-certified facility with in-house laboratory testing. It carries Kosher, Halal, and Non-GMO certifications, and is free from soy, dairy, eggs, and gluten. The moderate dosing makes it easy to titrate up if needed while minimizing risk of oversupplementation.
Key Specifications:
- Vitamin D3: 1,000 IU (25 mcg) per capsule
- Vitamin K2: 45 mcg as MK-4
- Form: Vegetarian capsule
- Count: 120 capsules
- Certifications: Non-GMO, Kosher, Halal, GMP
- Third-party tested: In-house laboratory
Considerations: Uses MK-4 form of K2 rather than MK-7; some research suggests MK-7 has a longer half-life in the body. Those with significant deficiency may need higher doses.
Pure Encapsulations Vitamin D3 & K2 — Best Premium/Hypoallergenic
For those with sensitivities or who demand the cleanest ingredients, Pure Encapsulations offers a hypoallergenic formula free from artificial additives, making it a favorite among healthcare practitioners.
Pure Encapsulations has earned its reputation as a practitioner-trusted brand by focusing on purity and research-backed formulations. Their D3 & K2 supplement delivers 4,000 IU of vitamin D3—the tolerable upper intake level recommended for adults—alongside 100 mcg of vitamin K2 as MK-7.
What sets this product apart is what it leaves out: no wheat, gluten, eggs, peanuts, artificial colors, flavors, sweeteners, or unnecessary binders and fillers. Every batch undergoes third-party testing for potency and purity. The vegetarian capsules are made from cellulose with hypoallergenic plant fiber.
Key Specifications:
- Vitamin D3: 4,000 IU (100 mcg) per capsule
- Vitamin K2: 100 mcg as MK-7
- Form: Vegetarian capsule
- Count: 120 capsules
- Certifications: Non-GMO, Gluten-Free
- Third-party tested: Yes
Considerations: Premium pricing reflects the quality; not the most economical choice for budget-conscious buyers. Not recommended for pregnant or lactating women without practitioner guidance.
Thorne Vitamin D + K2 Liquid — Best Liquid
With 600 servings per bottle and a metered dropper for precise dosing, Thorne’s liquid formula offers unmatched flexibility and value for those who prefer drops over pills.
Thorne is trusted by over 100 professional sports teams and is the #1 recommended clinical brand by healthcare practitioners. Their Vitamin D + K2 Liquid delivers 1,000 IU of D3 and 200 mcg of K2 per two-drop serving in an MCT oil base.
The self-dispensing metered dropper ensures accurate dosing without the mess of traditional droppers. You can take drops directly under the tongue or mix them into food and beverages. The liquid format makes it easy to adjust your dose based on blood test results or seasonal needs.
Key Specifications:
- Vitamin D3: 1,000 IU (25 mcg) per 2 drops
- Vitamin K2: 200 mcg as MK-4 per 2 drops
- Form: Liquid drops in MCT oil
- Count: 600 servings per 1 fl oz bottle
- Certifications: NSF Certified for Sport
- Third-party tested: Yes
Considerations: Uses MK-4 form of K2. Those taking anticoagulants like warfarin should avoid due to vitamin K content. Requires careful storage away from heat.
Bronson Vitamin K2 (MK7) with D3 — Best Value
A 250-count bottle from a trusted brand founded by pharmacists in 1960, Bronson delivers exceptional long-term value with quality manufacturing in their New York facility.
Bronson has been a staple in the supplement industry for over 60 years, starting as a small pharmacy operation. Their K2+D3 formula provides 5,000 IU of vitamin D3 with 90 mcg of vitamin K2 as MK-7—a clinically relevant ratio for bone and cardiovascular support.
Every product is manufactured in Bronson’s own GMP-registered facility in Hauppauge, New York, with rigorous in-house testing for purity, potency, and integrity. The 250-capsule bottle provides over 8 months of daily supplementation at an incredibly competitive price point.
Key Specifications:
- Vitamin D3: 5,000 IU (125 mcg) per capsule
- Vitamin K2: 90 mcg as MK-7
- Form: Vegetarian capsule
- Count: 250 capsules
- Certifications: Non-GMO, Gluten-Free, Soy-Free
- Third-party tested: In-house laboratory
Considerations: Testing is in-house rather than independent third-party. Not recommended for pregnant or nursing women.
Micro Ingredients Vitamin D3 10,000 IU + K2 — Best High Potency
For those with documented deficiency or higher vitamin D needs, this extra-strength formula delivers 10,000 IU per softgel with 200 mcg of K2 in a convenient 300-count pouch.
Micro Ingredients specializes in high-potency supplements, and their D3+K2 formula is designed for those who need to quickly replenish vitamin D levels. Each mini softgel contains 10,000 IU of D3 as cholecalciferol and 200 mcg of K2 as MK-7, infused with virgin coconut oil for enhanced absorption.
The resealable pouch contains 300 softgels—nearly a year’s supply at one per day. All ingredients undergo third-party lab testing, and the product is free from soy, dairy, gluten, and preservatives.
Key Specifications:
- Vitamin D3: 10,000 IU (250 mcg) per softgel
- Vitamin K2: 200 mcg as MK-7
- Form: Mini softgel with coconut oil
- Count: 300 softgels
- Certifications: Non-GMO
- Third-party tested: Yes
Considerations: 10,000 IU exceeds the tolerable upper intake level of 4,000 IU; should only be used under healthcare provider guidance and with regular blood monitoring. Not for daily maintenance in those with adequate levels.
Dr. Berg Vitamin D3 K2 5000 IU — Best with Cofactors
This comprehensive formula goes beyond D3+K2 by including magnesium, zinc, B6, and MCT oil—cofactors that may help your body better absorb and utilize vitamin D.
Dr. Eric Berg’s supplement line focuses on synergistic formulations, and this D3+K2 product exemplifies that approach. Beyond 5,000 IU of D3 and 50 mcg of K2, each capsule includes magnesium, vitamin B6, zinc, MCT oil powder, and ox bile—nutrients that research suggests may enhance vitamin D metabolism and absorption.
The formula is manufactured in cGMP-certified facilities in the USA and undergoes 4X lab testing for quality verification. The 60-day supply comes with a 30-day satisfaction guarantee.
Key Specifications:
- Vitamin D3: 5,000 IU (125 mcg) per capsule
- Vitamin K2: 50 mcg as MK-7
- Additional: Magnesium, Zinc, B6, MCT Oil, Ox Bile
- Form: Capsule
- Count: 60 capsules
- Third-party tested: Yes (4X testing)
Considerations: Contains ox bile, making it unsuitable for vegetarians/vegans. Those already taking magnesium or zinc supplements should account for the additional amounts.
Nature Made Vitamin D3 K2 — Most Trusted Brand
As the #1 pharmacist-recommended vitamin brand, Nature Made offers peace of mind with USP verification and widespread retail availability for easy restocking.
Nature Made has been a household name in vitamins for decades and is consistently the most recommended brand by pharmacists. Their D3+K2 softgels deliver 5,000 IU of vitamin D3 with 100 mcg of vitamin K2 as MK-7 to support bone, teeth, muscle, and immune health.
The formula is designed for those with higher vitamin D needs or documented deficiency. It’s made with no synthetic dyes (colors derived from natural sources), no artificial flavors, and is gluten-free.
Key Specifications:
- Vitamin D3: 5,000 IU (125 mcg) per softgel
- Vitamin K2: 100 mcg as MK-7
- Form: Softgel
- Count: 30 softgels
- Certifications: Gluten-Free
- Third-party tested: USP verified (select products)
Considerations: Smaller bottle size (30 count) compared to competitors. Contains soybean oil, which may be a concern for those with soy sensitivities.
Solaray Vitamin D3 + K2 — Best Vegetarian Capsule
With K2 sourced from fermented chickpea and housed in vegetarian capsules, Solaray offers a soy-free option for vegetarians who prefer capsules over softgels.
Solaray has been a leader in the natural products industry since 1973. Their D3+K2 formula provides 5,000 IU of vitamin D3 alongside 50 mcg of vitamin K2 as MK-7 derived from fermented chickpea—avoiding the soy-based K2 found in many competitors.
The product is manufactured in Solaray’s own GMP-certified facility in Utah with state-of-the-art lab testing. A 60-day money-back guarantee backs every purchase.
Key Specifications:
- Vitamin D3: 5,000 IU (125 mcg) per VegCap
- Vitamin K2: 50 mcg as MK-7 from chickpea
- Form: Vegetarian capsule
- Count: 120 VegCaps
- Certifications: Soy-Free
- Third-party tested: In-house laboratory
Considerations: K2 dose (50 mcg) is lower than some competitors. Capsule form may not absorb as efficiently as oil-based softgels for some individuals.
Metagenics Vitamin D3 5000 + K — Best Professional Grade
As the #1 doctor-recommended professional supplement brand, Metagenics delivers clinical-grade quality with a 60-day satisfaction guarantee and practitioner-trusted formulation.
Metagenics supplements are typically found in healthcare practitioner offices rather than retail shelves, reflecting their clinical-grade standards. Their D3 5000 + K formula delivers 5,000 IU of vitamin D3 with both forms of vitamin K—90 mcg as MK-7 and 20 mcg as K1—for comprehensive support.
The formula uses an olive oil base for enhanced absorption and is manufactured under strict cGMP guidelines with rigorous testing protocols. A 60-day satisfaction guarantee provides peace of mind.
Key Specifications:
- Vitamin D3: 5,000 IU (125 mcg) per softgel
- Vitamin K: 90 mcg MK-7 + 20 mcg K1
- Form: Softgel with olive oil
- Count: 60 softgels
- Certifications: Non-GMO, Gluten-Free
- Third-party tested: Yes
Considerations: Premium pricing typical of professional-grade supplements. Manufactured in a facility that processes common allergens including wheat, soy, milk, and tree nuts.
Buying Guide: What to Look for in a Vitamin D3+K2 Supplement
Key Quality Indicators
- Form of D3: Look for cholecalciferol (D3) rather than ergocalciferol (D2). D3 raises blood levels more effectively and maintains them longer.
- Form of K2: MK-7 has a longer half-life than MK-4, remaining active in your body longer. However, both forms are effective.
- Oil carrier: Fat-soluble vitamins absorb better with fat. Softgels containing MCT, coconut, or olive oil typically offer superior bioavailability.
- Dosage ratios: Research supports various D3:K2 ratios, but products with at least 45-100 mcg of K2 per 1,000-5,000 IU of D3 are common in quality supplements.
Certifications That Matter
- Third-party testing: Independent verification (NSF, USP, ConsumerLab) confirms potency and purity.
- GMP certification: Ensures consistent manufacturing practices and quality control.
- Non-GMO Project Verified: Confirms ingredients are not genetically modified.
- Vegan Certified: Guarantees plant-based ingredients for those avoiding animal products.
Red Flags to Avoid
- Products without any third-party testing or quality certifications
- Proprietary blends that hide individual ingredient amounts
- Excessive doses without clear guidance (e.g., 50,000+ IU without warnings)
- Added artificial colors, flavors, or unnecessary fillers
- Extremely low prices that suggest questionable sourcing or manufacturing
Form Selection Guidance
- Choose softgels for optimal absorption and convenience
- Choose capsules if you’re vegetarian or prefer to avoid gelatin
- Choose liquid for flexible dosing, difficulty swallowing pills, or best value per serving
- Choose formulas with cofactors if you have known deficiencies in magnesium or zinc
How to Take Vitamin D3+K2
Recommended Dosage
The Recommended Daily Allowance (RDA) for vitamin D is 600-800 IU for most adults, though many experts suggest 1,000-2,000 IU for optimal levels. The tolerable upper intake level is 4,000 IU per day. For vitamin K, adequate intake is 90-120 mcg daily.
However, individual needs vary significantly based on factors like sun exposure, skin tone, age, weight, and existing blood levels. A 25-hydroxyvitamin D blood test can help determine your optimal dosage.
Best Time to Take
Take your D3+K2 supplement with your largest meal of the day—ideally one containing healthy fats. This can increase vitamin D absorption by up to 50%. Some people prefer taking it with breakfast or lunch rather than dinner to avoid any potential interference with sleep.
Usage Instructions by Form
- Softgels/Capsules: Take with a full glass of water alongside a fat-containing meal
- Liquid drops: Place directly under tongue for fastest absorption, or mix into food/beverages. Can be added to smoothies, salad dressings, or coffee
Duration and Cycling
Most people can take D3+K2 supplements continuously, especially those living in northern latitudes or with limited sun exposure. Some practitioners recommend periodic blood testing (every 3-6 months initially) to ensure levels remain in the optimal range of 40-60 ng/mL for vitamin D.
Potential Benefits of Vitamin D3+K2
Bone Health Support
Research suggests vitamin D3 may help the body absorb calcium, while K2 activates proteins that direct calcium to bones and teeth rather than soft tissues. A 2017 review in the International Journal of Endocrinology noted that combined D3+K2 supplementation may be more effective for bone health than either vitamin alone.
Cardiovascular Support
Vitamin K2 may help prevent calcium from accumulating in arterial walls. Studies have associated higher vitamin K2 intake with healthier cardiovascular outcomes. The combination with vitamin D3 may support arterial flexibility and proper calcium metabolism in vascular tissue.
Immune Function
Vitamin D receptors are found on immune cells throughout the body, and research suggests adequate vitamin D levels may support immune system function. Studies have linked vitamin D deficiency to increased susceptibility to various health challenges.
Muscle Function
Vitamin D may support muscle strength and function, particularly as we age. Research has associated vitamin D deficiency with muscle weakness and increased fall risk in older adults.
Mood Support
Some studies suggest a correlation between low vitamin D levels and mood disturbances. While more research is needed, maintaining adequate vitamin D levels may support overall mental wellbeing, particularly during winter months with limited sunlight.
Safety Considerations
Potential Side Effects
At recommended doses, vitamin D3+K2 supplements are generally well-tolerated. However, excessive vitamin D intake can lead to vitamin D toxicity (hypervitaminosis D), which may cause nausea, vomiting, weakness, and serious complications like kidney problems. This typically only occurs with prolonged intake of very high doses (generally above 10,000 IU daily for extended periods).
Who Should Avoid or Use Caution
- Those on blood thinners: Vitamin K can interfere with anticoagulant medications like warfarin (Coumadin). Consult your healthcare provider before supplementing.
- Those with hypercalcemia: Vitamin D increases calcium absorption, which could worsen high calcium conditions.
- Those with kidney disease: The kidneys play a role in vitamin D metabolism; dosing may need adjustment.
- Pregnant or nursing women: While vitamin D is important during pregnancy, high doses should only be taken under medical supervision.
- Those with granulomatous diseases: Conditions like sarcoidosis may cause abnormal vitamin D metabolism.
Drug Interactions
- Anticoagulants (warfarin, heparin)
- Certain cholesterol medications
- Steroids (corticosteroids)
- Some weight loss drugs (orlistat)
- Certain seizure medications
When to Consult a Healthcare Provider
Speak with a healthcare professional before starting vitamin D3+K2 supplementation if you have any medical condition, take prescription medications, or are pregnant or nursing. It’s also wise to get a baseline vitamin D blood test to determine your current levels and appropriate dosing.
Frequently Asked Questions
Should I take vitamin D3 with or without K2?
Research suggests taking D3 with K2 may be more beneficial than D3 alone. While vitamin D3 helps your body absorb calcium, K2 helps ensure that calcium gets deposited in your bones rather than accumulating in your arteries. The combination may provide more comprehensive support for bone and cardiovascular health.
How much vitamin D3 and K2 should I take daily?
General recommendations range from 1,000-2,000 IU of D3 for maintenance, with 50-100 mcg of K2. Those with documented deficiency may need 4,000-5,000 IU under healthcare provider guidance. The optimal dose depends on your current blood levels, sun exposure, diet, and individual factors.
Can I take too much vitamin D3+K2?
Yes, excessive vitamin D can lead to toxicity. The tolerable upper intake level is 4,000 IU daily for most adults. Vitamin K has no established upper limit due to its low toxicity potential. However, those on blood thinners should be cautious with vitamin K intake.
When is the best time to take D3+K2?
Take your supplement with your largest meal of the day, ideally one containing healthy fats like avocado, olive oil, or nuts. This significantly improves absorption of these fat-soluble vitamins.
What are the signs of vitamin D deficiency?
Common signs may include fatigue, bone or muscle pain, muscle weakness, mood changes, frequent illness, and slow wound healing. However, many people with deficiency have no obvious symptoms, which is why blood testing is recommended.
Is MK-7 better than MK-4 for vitamin K2?
MK-7 has a longer half-life (approximately 3 days vs. a few hours for MK-4), meaning it remains active in your body longer. This may make it more effective at lower doses. However, both forms have been shown to be beneficial in studies.
Can I get enough D3 and K2 from food alone?
It’s challenging for most people. Vitamin D3 food sources are limited (fatty fish, egg yolks, fortified foods), and K2 is found primarily in fermented foods (natto, certain cheeses) and animal products. Most people in northern climates benefit from supplementation, especially during winter months.
Should I take calcium with D3+K2?
Not necessarily. If you’re already getting adequate calcium from your diet (dairy, leafy greens, fortified foods), additional calcium supplementation may not be needed. Vitamin D helps you absorb dietary calcium, and K2 helps direct it properly. Consult your healthcare provider about your specific needs.
Are there any natural sources of vitamin K2?
Yes. Natto (fermented soybeans) is the richest source, followed by certain cheeses (especially gouda and brie), egg yolks, chicken, and beef liver. However, most Western diets are low in K2, making supplementation beneficial for many people.
How long does it take to correct a vitamin D deficiency?
With appropriate supplementation, most people can correct a deficiency within 2-3 months, though severe deficiencies may take longer. Follow-up blood testing can confirm your levels have normalized.
Bottom Line
For most people: Sports Research Vitamin D3 + K2 offers the best combination of quality, third-party testing, and vegan-friendly formulation with optimal dosing.
For budget buyers: NOW Foods Vitamin D-3 & K-2 delivers reliable quality at an unbeatable price with a moderate dose suitable for daily maintenance.
For premium seekers: Pure Encapsulations Vitamin D3 & K2 provides practitioner-grade purity with hypoallergenic formulation for those with sensitivities.
For pill-averse individuals: Thorne Vitamin D + K2 Liquid offers 600 servings with precise, customizable dosing in an easy-to-use liquid format.
For high-dose needs: Micro Ingredients D3 10,000 IU + K2 delivers potent deficiency-correcting doses—use only under healthcare provider guidance.
For comprehensive support: Dr. Berg Vitamin D3 K2 includes cofactors like magnesium and zinc for enhanced vitamin D utilization.
