You know vitamin D is crucial for bone health and immune function, but pairing it with vitamin K2 maximizes calcium absorption and directs it to where it belongs. With so many options, choosing between top brands like Sports Research and Thorne can feel confusing. This guide compares their D3+K2 supplements head-to-head, helping you decide based on form, potency, and ingredient sourcing. Whether you prefer a liquid or capsule, vegan or conventional, we’ll help you find the right fit. For more on how these nutrients support circulation, check out our guide on supplements for healthy blood flow.
Pros
- High-quality, third-party tested formula from a reputable brand
- Metered dispenser offers precise dosing and reduces waste
- Liquid format is easy to swallow and absorb, ideal for those who dislike pills
- Supports multiple health systems: bones, muscles, heart, and immune function
- Excellent value with 600 servings per bottle
Cons
- Liquid may require refrigeration after opening to maintain freshness
- Some users may prefer capsule form for convenience or travel
- The metered dispenser can occasionally clog if not cleaned properly
Thorne's Vitamin D + K2 Liquid is a thoughtfully formulated dietary supplement designed for individuals seeking comprehensive support for bone, muscle, and cardiovascular health. The liquid format, paired with a metered dispenser, makes it especially appealing for those who have difficulty swallowing capsules or want precise control over their dosage.
What sets this product apart is its synergistic combination of vitamins D3 and K2. Vitamin D enhances calcium absorption from the gut, while vitamin K2 directs that calcium to the bones and away from soft tissues like arteries and kidneys. This dual action not only strengthens bones but also supports heart health, making it a smart choice for aging adults, athletes, or anyone focused on long-term wellness.
The metered dispenser is a standout design feature, delivering consistent drops with each press. The liquid is well-tolerated and has a neutral taste, blending easily into water or a smoothie. Thorne's commitment to quality is evident through third-party certification, which verifies the product's purity and potency. It's no surprise that Thorne is trusted by over 100 professional sports teams and frequently recommended by health-care practitioners.
One potential drawback is that the liquid may need refrigeration after opening to maintain its stability, which could be inconvenient for some users. Additionally, while the dispenser is generally reliable, it may require occasional cleaning to prevent clogging. However, these minor issues are outweighed by the product's efficacy and value, especially given the 600 servings per bottle.
Overall, Thorne Vitamin D + K2 Liquid is a top-tier supplement that delivers on its promises. It is ideal for anyone wanting a high-quality, easy-to-use vitamin D and K2 combo backed by rigorous testing and professional endorsements. For those prioritizing bone and heart health, this liquid formula is an excellent investment.
Brand: Thorne
Product Name: Vitamin D + K2 Liquid
Size: 1 Fl Oz (30 mL)
Servings: 600
Dispenser: Metered dropper
Key Ingredients: Vitamin D3 (as cholecalciferol), Vitamin K2 (as menaquinone-7)
Third-Party Certified: Yes
Dimensions: 1.25 x 1.25 x 3.35 inches
Weight: 0.17 pounds
Pros
- Plant-based D3 from lichen, suitable for vegans and those with lanolin sensitivities.
- Moderate 2500 IU dose ideal for daily maintenance without the risk of over-supplementation.
- Includes vitamin K2 to direct calcium to bones and support heart health.
- Formulated with MCT oil for enhanced absorption of fat-soluble vitamins.
- Free from common allergens and artificial additives, with third-party testing for purity.
Cons
- The 60-count size may require more frequent repurchasing for those who prefer larger value sizes.
- Some users may find the softgels larger and harder to swallow, though this is subjective.
- The moderate 2500 IU dose may be too low for individuals with a diagnosed vitamin D deficiency needing higher therapeutic doses.
Sports Research Vegan Vitamin D3 + K2 offers a well-rounded, plant-based approach to daily wellness. This supplement is specifically designed for individuals following a vegan or vegetarian lifestyle, or anyone who prefers to avoid animal-derived ingredients like lanolin. It's also a great choice for those seeking a moderate, maintenance-level dose of vitamin D3 without the high amounts found in many other supplements.
The standout feature is its use of vitamin D3 sourced from wild-crafted lichen, a sustainable and truly vegan alternative. Combined with vitamin K2 and organic coconut MCT oil, this formula is designed for optimal absorption, ensuring you get the most benefit from each softgel. In real-world use, this translates to reliable daily support for immune function, bone health, and overall vitality, making it a simple addition to a health-conscious routine.
In terms of design, the Plantgels™ are easy to swallow and have a minimal aftertaste, which is a plus for those sensitive to supplements. The packaging is clean and functional, clearly listing all ingredients and certifications. The product is also Non-GMO Project Verified and free from common allergens like gluten and soy, which adds to its appeal for those with dietary restrictions.
While the 60-count bottle is convenient, heavy users might find themselves reordering frequently. Additionally, the 2500 IU dose is on the lower end, so those with a known deficiency should consult a healthcare provider for a higher-potency option. However, for everyday maintenance and preventive support, this strength is often ideal.
Overall, Sports Research Vegan Vitamin D3 + K2 is a high-quality, transparently sourced supplement that delivers on its promises. It's a fantastic choice for vegans, vegetarians, and anyone seeking a clean, effective daily D3 and K2 combo. The brand's commitment to third-party testing and clean ingredients makes it a trustworthy option in a crowded market.
Pros
- High potency with 4000 IU vitamin D3 plus K2 for synergistic benefits
- Supports multiple health areas: bones, heart, and immune system
- Allergen-free and clean formulation suitable for sensitive individuals
- Trusted brand with rigorous quality testing
- Easy-to-swallow capsules, one per day
Cons
- Higher price point compared to some generic vitamin D supplements
- Contains only 120 capsules, may run out quickly for those needing higher doses
- No customer reviews yet to gauge real-world experiences
Pure Encapsulations Vitamin D3 & K2 is a dietary supplement designed to support bone health, cardiovascular function, and immune wellness. It is ideal for individuals seeking a high-potency vitamin D3 (4000 IU) combined with vitamin K2 to optimize calcium utilization. This product is especially suitable for those with dietary restrictions or allergies, as it is free from common allergens and artificial additives.
The standout feature is the synergistic pairing of vitamin D3 and K2. Vitamin D3 enhances calcium absorption, while K2 directs calcium to bones and teeth rather than soft tissues, supporting arterial flexibility. Users can expect improved bone density maintenance and immune system support, especially during seasonal changes. The 4000 IU dosage meets many supplementation guidelines for adults.
Pure Encapsulations is known for its commitment to purity. Each capsule is made with premium ingredients and is third-party tested for potency and contaminants. The product is non-GMO and free from gluten, soy, dairy, and other common allergens. The bottle is compact and easy to store, with a clear label indicating dosage and ingredients.
One potential drawback is the price, which is higher than some basic vitamin D supplements. Additionally, the bottle contains 120 capsules, which at one per day lasts four months, but those requiring higher doses may need multiple bottles. As a newer listing, there are no customer reviews yet, so long-term user feedback is unavailable.
Overall, Pure Encapsulations Vitamin D3 & K2 is a premium supplement that delivers on its promises of bone, heart, and immune support. The clean formulation and high potency make it a reliable choice for health-conscious consumers. While the cost is above average, the quality justifies the investment for those prioritizing purity and efficacy.
Pros
- Vegan-friendly formulation using lichen-derived D3 and fermented chickpea K2.
- Includes coconut MCT oil to enhance absorption of fat-soluble vitamins.
- Third-party tested and certified Non-GMO and Vegan.
- Convenient once-daily dosage with high potency (5000 IU D3, 100 mcg K2).
- Free from common allergens like gluten and soy.
Cons
- Price is higher than some synthetic D3+K2 supplements.
- Softgel size may be large for those who have difficulty swallowing pills.
- 5000 IU D3 may be too high for individuals with certain health conditions; consult a healthcare provider.
Sports Research Vegan Vitamin D3 + K2 combines two essential fat-soluble vitamins in a plant-based softgel. This formula is designed for vegans and anyone seeking a clean, high-quality supplement that supports bone density, immune function, and cardiovascular health.
The standout feature is the sourcing: vitamin D3 comes from lichen (a vegan alternative to lanolin), and vitamin K2 (as MK-7) is derived from fermented chickpeas. The addition of coconut MCT oil aids absorption, making these nutrients more bioavailable. Each softgel provides 5000 IU of D3 and 100 mcg of K2, a potent once-daily dose.
In terms of quality, Sports Research has third-party tested each batch and earned Vegan and Non-GMO certifications. The softgels are free from gluten, soy, carrageenan, and artificial fillers. The product is manufactured in a cGMP-compliant facility in the USA.
A potential drawback is the cost, which is higher than many synthetic D3+K2 supplements. Also, the 5000 IU D3 dose may be excessive for those with lower requirements. The softgel size is average but may still be challenging for some users.
Overall, this is an excellent choice for vegans and health-conscious individuals who want a transparent, plant-based D3+K2 supplement. It delivers clinical-strength dosing with clean ingredients, making it a reliable addition to a daily wellness routine.
Color: No Color
Size: 120 Count (Pack of 1)
Dimensions: 2.4 x 2.13 x 4.2 inches
Weight: 0.18 pounds
Product Group: Drugstore
Binding: Health and Beauty
Pros
- 100% vegan vitamin D3 from lichen, not lanolin
- Combines D3 and K2 for synergistic bone and heart benefits
- Coconut oil base enhances absorption of fat-soluble nutrients
- Free from common allergens and artificial additives
- Trusted brand with third-party testing
Cons
- Limited customer reviews available to gauge long-term satisfaction
- Price may be higher compared to synthetic vitamin D3 supplements
- Requires consistent daily use to see noticeable benefits
The Sports Research Vegan Vitamin D3 + K2 with Coconut Oil is a plant-based dietary supplement designed for individuals seeking a clean, effective way to support bone density, immune function, and cardiovascular health. This product is ideal for vegans, vegetarians, or anyone avoiding animal-derived ingredients, as it uses vitamin D3 from lichen rather than the traditional lanolin source.
Standout features include the combination of vitamin D3 (2,500 IU per serving) and vitamin K2 as MK-7 (100 mcg), which work together to optimize calcium utilization. The addition of organic coconut oil in the Plantgels helps improve absorption of these fat-soluble vitamins, making each dose more effective. The capsules are small and easy to swallow, which is a plus for daily compliance.
In terms of design and build quality, Sports Research has a reputation for third-party testing and clean manufacturing. The Plantgels are free from gluten, soy, and GMOs, aligning with a clean-label philosophy. The bottle contains 60 servings at the recommended dosage, providing a two-month supply.
A potential drawback is the lack of customer reviews at launch, making it harder to assess real-world performance. Additionally, the price point is slightly higher than synthetic alternatives, though the premium ingredients justify the cost for those prioritizing vegan sourcing. As with any supplement, results require consistent use over time.
Overall, the Sports Research Vegan Vitamin D3 + K2 with Coconut Oil is a well-formulated, trustworthy choice for anyone seeking a plant-based D3 and K2 combo. Its thoughtful ingredient synergy and clean profile make it a strong contender in the supplement market, especially for health-conscious vegans and those with dietary restrictions.
Buying Guide
Form and Convenience: Liquid vs Capsule
Thorne offers a liquid with a metered dispenser, ideal for those who want adjustable dosing or have trouble swallowing pills. Each drop delivers precise amounts, and the liquid is rapidly absorbed. Sports Research and Pure Encapsulations provide capsules or softgels, which are portable and easy to take on the go. If you travel often or prefer a no-mess routine, capsules win. But if you value flexibility and fast absorption, the liquid form stands out.
Dosage Strength and Synergy
Thorne’s liquid delivers 600 servings per bottle, allowing you to customize your daily intake. Each drop contains 1,000 IU of D3 and 100 mcg of K2 (as MK-4). Sports Research offers 2,500 IU (60-count) and 5,000 IU (120-count) options with 100 mcg K2 as MK-7, a more bioavailable form. Pure Encapsulations provides 4,000 IU D3 plus 90 mcg K2 as MK-7. Choose higher potency if you need a boost, or a moderate dose for maintenance. Your specific needs, such as low blood levels or lifestyle, should guide your choice.
Ingredient Sourcing and Dietary Preferences
Sports Research uses vegan D3 from lichen, making it suitable for plant-based diets. Thorne’s D3 is derived from lanolin (sheep’s wool) and is not vegan, but it’s a high-quality, conventional option. Pure Encapsulations also uses lanolin-derived D3. If you follow a vegan or vegetarian lifestyle, Sports Research is the clear winner. All products are free from major allergens, but check labels for additional sensitivities. For more on nutrient combinations that support overall health, see our piece on nutrients for healthy circulation.
Quality Assurance and Third-Party Certification
Thorne and Pure Encapsulations are known for rigorous third-party certification, ensuring purity and potency. Sports Research also verifies each batch through independent labs and holds Non-GMO Project and Vegan certifications. Look for cGMP compliance and certificates of analysis to confirm what’s inside matches the label. All three brands prioritize transparency, giving you confidence in your supplement choice. For more product comparisons, visit our comparisons category page.
Final Thoughts
Choosing between Sports Research and Thorne comes down to your priorities. If you want a vegan, plant-based formula with moderate strength and easy capsules, go with Sports Research® Vegan Vitamin D3 + K2 w/Coconut. If you prefer a liquid format with precise, adjustable dosing and a trusted clinical brand, Thorne Vitamin D + K2 Liquid with a Metered is an excellent choice. Both deliver quality, but your lifestyle and dietary needs will point you to the right one.
Frequently Asked Questions
Which is better for vegans: Sports Research or Thorne? Sports Research is the clear winner because its D3 is derived from lichen, making it 100% plant-based. Thorne uses lanolin, so it is not suitable for vegans.
What dosage of vitamin D should I take daily with K2? Typical doses range from 1,000 to 5,000 IU per day. In 2026, many experts recommend 2,000 to 4,000 IU for adults, but you should check your blood levels and consult a healthcare provider. Pairing with 100 mcg of K2 (MK-7) is common for optimal calcium routing.
Can I take D3 and K2 together? Yes, they work synergistically. D3 helps absorb calcium, and K2 directs it to bones and teeth instead of soft tissues. Taking them together in one supplement ensures proper balance and convenience.
How do liquid and capsule forms compare for absorption? Liquids are absorbed quickly because they bypass the need for capsule breakdown. Capsules with MCT oil, like those from Sports Research, also enhance fat-soluble vitamin absorption. Both forms are effective; choose based on your preference. For more on how these nutrients support cardiovascular wellness, see our article on nutrients for healthy circulation.
