Are you struggling to maintain strong bones and a healthy heart as you age? You might be overlooking two critical nutrients: vitamin D3 and vitamin K2. These fat-soluble vitamins work synergistically to support calcium metabolism, directing calcium to your bones and teeth while preventing it from accumulating in your arteries. In this NOW Foods Vitamin K2 review, we evaluate three top-rated supplements that combine these nutrients, helping you choose the right formula for your wellness routine in 2026. Whether you are new to these supplements or looking to upgrade your current stack, our guide covers key features and considerations.
NOW Foods is a trusted brand in the natural products industry, known for its commitment to quality and transparency. Their vitamin D3 and K2 supplements are popular among health-conscious individuals seeking reliable, affordable options. To give you a broader perspective, we have also reviewed Carlson Vitamin K2 supplements in a separate article.
Pros
- Synergistic combination of D3 and K2 enhances calcium absorption and utilization.
- Clean ingredients: vegan, gluten-free, non-GMO, soy-free, and kosher.
- GMP certified manufacturing ensures high quality and consistency.
- Economical 6-month supply in a single bottle.
- Trusted brand with decades of experience in the supplement industry.
Cons
- New product with no customer reviews yet, so long-term user satisfaction is unverified.
- Fixed dosage may not be adjustable for individuals with specific higher or lower requirements.
- Capsules may be unsuitable for those who prefer liquid or powder forms of supplementation.
NOW Foods Vitamin D3 K2 is a combination supplement designed to support bone and cardiovascular health. It provides 1,000 IU of vitamin D3 and 45 mcg of vitamin K2 in a single vegan capsule, making it a convenient choice for daily supplementation.
This product is ideal for adults who want to maintain strong bones, healthy teeth, and proper calcium metabolism. The synergistic action of D3 and K2 helps direct calcium to the bones and away from soft tissues, supporting arterial health. It also contributes to immune function and overall wellness.
NOW Foods is a trusted brand with a commitment to quality. This supplement is non-GMO, kosher, soy-free, and vegan, catering to various dietary preferences. The capsule is vegetarian-friendly, and the 180-count bottle offers a six-month supply, ensuring value and sustainability.
As a new product, it has no customer reviews yet, so long-term user experiences are unknown. The fixed dosage might not suit everyone, especially those requiring higher vitamin D3 levels. Individual needs may vary, and consulting a healthcare professional is recommended.
Overall, NOW Foods Vitamin D3 K2 is a well-formulated supplement with high-quality ingredients and a reasonable price point. It combines essential nutrients for bone and heart support in an easy-to-take capsule. For those seeking a reliable daily supplement, this is a solid choice.
Pros
- Dual nutrient formula (D3 + K2) for synergistic bone and heart benefits.
- Non-GMO, Soy Free, and Kosher certified for clean supplementation.
- GMP Quality Assured with in-house lab testing for purity and potency.
- Affordable price point for a two-month supply.
- Trusted brand with decades of experience in natural supplements.
Cons
- Some users may prefer higher vitamin D3 dosages (e.g., 2000 IU) for stronger immune support.
- Capsules are beige in color, which may indicate natural ingredients but could be less visually appealing.
- No customer reviews available yet, so real-world feedback is limited.
The NOW Supplements Vitamin D-3 & K-2 combines 1000 IU of vitamin D3 with 45 mcg of vitamin K2 in a single veg capsule. This formula is designed for adults seeking comprehensive support for bone density, cardiovascular function, and immune health. It's an excellent choice for those who prefer a dual-nutrient supplement over taking separate pills.
The synergy between D3 and K2 is a standout feature. Vitamin D3 enhances calcium absorption, while K2 directs that calcium to the bones and teeth, preventing it from depositing in arteries. This combination supports both skeletal strength and heart health. The 1000 IU D3 dosage is suitable for general maintenance, and the 45 mcg K2 (as MK-7) ensures optimal bioavailability.
NOW is a reputable manufacturer with GMP Quality Assurance and third-party testing. The capsules are vegan, non-GMO, soy-free, and kosher. Each bottle contains 120 capsules, providing a two-month supply when taken as directed. The beige color reflects the natural ingredients, and the packaging is straightforward and informative.
One potential drawback is the relatively modest vitamin D3 dose of 1000 IU. Some individuals, especially those with deficiencies or limited sun exposure, may require a higher dosage. Additionally, the lack of customer reviews makes it harder to gauge long-term satisfaction. However, NOW's longstanding reputation mitigates this concern.
Overall, the NOW Vitamin D-3 & K-2 supplement offers a well-researched, high-quality combination at an affordable price. It's ideal for anyone looking to support bone and cardiovascular health with a clean, trusted brand. While the D3 dose may be low for some, it's a solid starting point for daily maintenance.
Pros
- Effective combination of D3 and K2 for synergistic bone and heart benefits
- MenaQ7 MK-7 is a superior, well-researched form of vitamin K2
- Third-party tested for stability, potency, and formulation accuracy
- Soy-free and suitable for various dietary preferences
- Reputable brand with long-standing commitment to quality
Cons
- 5000 IU of D3 may be too high for some individuals; consult a healthcare provider
- Capsules are slightly larger than average, which may be difficult for some to swallow
- Price is higher than basic vitamin D3 supplements due to added K2
The NOW Supplements Mega D-3 & MK-7 is a targeted nutritional formula designed for adults who want to support both bone density and cardiovascular health. It combines 5000 IU of vitamin D3 with 180 mcg of vitamin K2 as MenaQ7 MK-7, a unique soy-free and highly bioavailable form. This product is ideal for those who recognize the synergistic role these vitamins play in calcium metabolism and overall wellness.
Standout features include the clinically studied MenaQ7 MK-7, which supports arterial health by directing calcium away from blood vessels and into bones. The high-dose D3 also contributes to immune function, making this a versatile supplement. In real-world use, users report noticeable improvements in markers of bone strength and cardiovascular comfort when taken consistently as part of a balanced regimen.
Design and build quality reflect NOW's commitment to excellence. The capsules are off-white and free from common allergens like soy. The manufacturing process is GMP certified, with in-house ISO/IEC accredited labs testing for stability and potency. This level of transparency adds confidence for health-conscious consumers.
Potential drawbacks include the high D3 dosage, which may not be suitable for everyone without medical guidance. Additionally, the capsule size is slightly larger than standard, which could be a minor inconvenience for those who have difficulty swallowing pills. The price is also a step above basic D3 supplements, justified by the addition of premium K2.
Overall, the NOW Mega D-3 & MK-7 delivers on its promise of dual bone and cardiovascular support. It is a well-formulated, quality-assured product from a trusted brand. For individuals seeking a comprehensive vitamin D and K combination, this supplement is a reliable choice that balances efficacy with safety.
Buying Guide
When choosing a vitamin D3 and K2 supplement, several factors matter beyond just the brand name. Here are three key criteria to consider before making your purchase.
Dosage and Potency
The amount of vitamin D3 (measured in IU) and vitamin K2 (measured in mcg) varies across products. For general bone and heart health, a common dosage is 1,000 IU of D3 with 45 mcg of K2. However, some individuals may require higher doses, such as 5,000 IU of D3 and 180 mcg of K2, especially if they have limited sun exposure or specific health goals. Always consult with a healthcare professional to determine the optimal dosage for your needs. If you are also considering other supplements for men, our guide on magnesium glycinate benefits for men provides additional insights.
Form of Vitamin K2
Vitamin K2 comes in two main forms: MK-4 and MK-7. MK-7 is derived from natto (fermented soy) and has a longer half-life in the body, allowing for once-daily dosing. MK-4 has a shorter half-life and may require multiple doses per day. Most NOW Foods supplements use MK-7, specifically the patented MenaQ7, which is soy-free and bioavailable. This form is well researched for its role in arterial health and bone metabolism.
Certifications and Quality Assurance
Look for supplements that are non-GMO, kosher, soy-free, and produced in facilities with GMP (Good Manufacturing Practice) certification. NOW Foods products are manufactured in ISO/IEC accredited laboratories, ensuring rigorous quality control for potency, stability, and purity. These certifications provide peace of mind that the product meets high standards. For more comparisons, check our sports research vitamin K2 review for an alternative vegan option.
Number of Capsules and Value
Consider how many capsules you get per bottle and how that aligns with your daily regimen. A 120-capsule bottle at once-daily dosing lasts four months, offering good value. However, some users prefer larger bottles for fewer refills. Always check the serving size: some products require two capsules per day. If you are looking for a comprehensive multivitamin, our centrum Men’s multivitamin reviews may be helpful.
Final Thoughts
After reviewing these three NOW Foods supplements, we recommend the Now Supplements Vitamin D3 K2, 1,000 IU/45 mcg for those seeking an optimal balance of potency and value, especially with its high rating and 180-capsule supply. For individuals needing a higher dose to address specific deficiencies or increased demands, the NOW Supplements, Mega D-3 & MK-7 provides a robust 5,000 IU of D3 and 180 mcg of K2. Both options deliver the synergistic benefits of D3 and K2 for bone and cardiovascular support, backed by NOW Foods’ trusted quality standards.
Frequently Asked Questions
Are NOW Foods vitamin D3 and K2 supplements safe to take daily?
Yes, when taken as directed, NOW Foods vitamin D3 and K2 supplements are generally safe for daily use. Vitamin D3 and K2 are fat-soluble vitamins that can accumulate in the body, so it is important not to exceed the recommended dosage unless advised by a healthcare provider. Most users tolerate these supplements well, with few side effects.
What is the difference between MK-4 and MK-7 in vitamin K2 supplements?
MK-4 is a synthetic form of vitamin K2 with a short half-life, while MK-7 is a natural form derived from natto with a longer half-life, allowing for once-daily dosing. MK-7 is more commonly used in supplements due to its superior bioavailability and sustained activity in the body. NOW Foods products typically use MK-7, specifically MenaQ7, which is soy-free.
How long does it take to see results from taking vitamin D3 and K2 supplements?
Results can vary based on individual health status, diet, and dosage. Some users may notice improvements in bone density or cardiovascular markers after three to six months of consistent use. For optimal benefits, combine supplementation with a balanced diet rich in calcium and magnesium. If you have concerns about bone health, consider reviewing our guide on magnesium glycinate benefits for men.
Can I take NOW Foods D3 and K2 with other medications?
While vitamin D3 and K2 are generally safe, they may interact with certain medications, such as blood thinners (e.g., warfarin) or calcium channel blockers. Vitamin K can interfere with anticoagulant therapy, so it is crucial to consult your doctor before starting any new supplement, especially if you take prescription medications.
