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K2+D3: The Perfect Pair for Strong Bones & Heart Health
Unlock the key to enhancing calcium absorption and lifelong vitality with this essential combination.
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While vitamin D is well-known, many aren't aware of its lesser known, yet equally important, counterpart, K2. Vitamin K2 plays an essential role in vitamin D3's ability to build and maintain healthy bones; without it, the effects of vitamin D3 decrease dramatically.
However, most K2D3 products are using the generic form of K2, resulting in a less powerful supplement. So, how can you be sure you're getting this dynamic duo at its full potential?
We'll show you what to look for, what to avoid, and most importantly, how to find a K2D3 supplement that helps aid in heart health while providing maximum bone support. On top of that, we’ll reveal our picks for the top 5 K2D3 supplements available on the market today!
Benefits Of Vitamins K2 and D3
Promotes Bone Health & Calcium Absorption
Encourages Healthy Heart & Blood Circulation
Promotes Dental Health
Supports a Healthy Immune System
Aids in Mood & Energy Support
Why is vitamin K2 so important?
Vitamin K2 is a fat-soluble vitamin that must be consumed in dietary or supplement form since our bodies can’t produce sufficient amounts on their own. Maintaining healthy levels of vitamin K2 supports your heart, blood circulation, and your bones.
K2 + D3 have a dynamic relationship - working to aid calcium absorption, while directing it to your bones and teeth.
Getting to Know K2D3
Vitamins K2 and D3 are a powerful duo for teeth and bone health. D3 helps your bodymetabolize calcium by directing it to your teeth and bones, but this job isn’t complete without K2.Vitamin K2 activates the special proteinsneeded to deposit calcium in the correct spots.
In a survey from the National Health and Nutrition Examination, 25% of Americans were found to be at risk of a vitamin D deficiency, while 8% were vitamin D deficient - an increase from the previous 20 years. This research shows howwidespread low vitamin D levelscan be, and when left untreated, vitamin D deficiency canimpact bone health, as well asmood and energy levels.
Some of the calcium we consume can end up beingstored in blood vessels and soft tissues, constricting the flow of blood to your heart. Vitamin K2 works todraw this excess calcium awayfrom the soft tissue,aiding in blood circulation.
In addition to bone health, Vitamin D3 aids our bodies, maintaininghealthy immune system responses,aiding in mood support, andsupporting healthy energy levels.
Through clinical trials,Menaquinone or MK-7, the long-chain form of vitamin K2, was found to be10 to 100 times more powerfulthan generic vitamin K2, making MK7 a must forpotent artery and bone support.
We recommend a supplement that features a minimum of 10-20 mcg of vitamin D3 and 120 mg of vitamin K2 daily for adults, a recommendation that is also supported by the National Institute of Health.
Key Ingredients For Your Vitamin K2 Supplement
Research has shown that the long-chain form of vitamin K2,called menaquinone-7, offers more advanced benefits than its short-chain form, menaquinone-4. Unlike MK-4, MK-7 allows forsmaller, more convenient dosesbecause it accumulates in the bloodstream. MK-7 also aids inbone mineral density, helping withbone quality and strength- making it the superior form of K2.
Like K2, vitamin D3 is essential forhealthy bone formation, since it helps with calcium absorption. In fact, evidence suggests that taking both vitamins together ismore beneficial than taking either one alone!
As a fat-soluble vitamin, vitamin K2 is easier for your body to absorb when taken with a fatty oil. Avocado oil is naturally rich inheart-friendly fat, contains a variety ofhealthy antioxidants, and helps preserve vitamin K2 over time.
This extract ofheart-healthy fatshelps magnify the bioavailability of vitamins K2 and D3. When a K2 supplement with D3 combines MCT and avocado oil, it supports healthy immune, cardiovascular, and bone systems.
Which Form Comes Out on Top?
What To Avoid
Beware of unlisted sources of Vitamin K2 on product labels and low-cost supplements, which may contain synthetic versions of Vitamin K2 that are not only ineffective but can also cause dangerous unknown side-effects.
Like K2, vitamin D3 is essential forhealthy bone formation, since it helps with calcium absorption. In fact, evidence suggests that taking both vitamins together ismore beneficial than taking either one alone!
Top 5 Vitamin K2 Supplements of 2026
The results are in! After analyzing dozens of top-selling K2 supplements across multiple metrics, we’ve narrowed our list down to the best of the best. Check out which products made it into our Top 5 and who we crowned the best of 2026.
First, here's a side-by-side comparison of how industry-leading K2 & D3 supplements stack up against each other.
A+
OVERALL GRADE
PROS
-
Clinically studied MenaQ7
-
Contains vitamin D3
-
Avocado oil for better absorption
-
365-day money-back guarantee
CONS
-
Only available in the US and Canada
The Bottom Line
K2+D3 from Live Conscious is formulated with MenaQ7, the only clinically supported, patented vitamin K2 on the market today.
It contains a safe, naturally derived source of K2, for maximum absorption. It also contains 125 mcg of vitamin D3 for enhanced heart and bone health benefits.
K2+D3 also uses organic avocado oil to ensure effective absorption. It's important to note that Live Conscious offers a comprehensive 365-day return policy, and also promotes a whole-body approach to health.
With all this in mind, K2+D3 earned its spot at the top of our list.
*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
A
OVERALL GRADE
PROS
-
50mcg vitamin D3
-
Veldt grape for added bone support
-
Highly bioavailable form of calcium
-
365-day money-back guarantee
CONS
-
Does not use clinically studied K2
-
Only available online
The Bottom Line
Coming in a close second is Bone boost by Essential Elements for its competitive formula.
Bone boost contains 100 mcg of vitamin K2 and 50 mcg of vitamin D3. While it doesn't use a clinically studied form of vitamin K2, Bone boost makes up for it with the addition of ingredients, Cissus quadrangularis and Calcium Hydroxyapatite.
Cissus quadrangularis, commonly known as veldt grape, has been shown to help reduce bone loss and aid in bone formation. Calcium Hydroxyapatite is a highly bioavailable form of calcium derived from bovine, and which includes another important bone mineral, phosphorous.
Essential Elements offers a solid, 365-day money-back guarantee.
* Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
B+
OVERALL GRADE
PROS
-
250 mg of Vitamin D3
-
100 mcg Vitamin K2
-
No harmful additives or fillers
CONS
-
Lacks absorption-boosting fats
-
30-day return policy
The Bottom Line
Dr. Berg's D3 & K2 Vitamins score high on our list, thanks to the brand's dedicated focus on all-natural and keto-friendly solutions.
To boot, their formulation offers a robust dosage of 250 mg of Vitamin D3 & 100 mcg of Vitamin K2.
However, its 30-day money-back guarantee didn't do it any favors. Some won't see major results in their bone and cardiovascular health within that time frame. To make sure you're fully satisfied with your purchase, a money-back guarantee of at least 90 days is best.
Still, this is a strong overall supplement. It contains proper dosages of high-quality ingredients and lacks artificial fillers.
* Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
B
OVERALL GRADE
PROS
-
125 mcg vitamin D3
-
Non-GMO
-
Robust return policy
CONS
-
Does not use clinically studied K2
-
Magnesium stearate
-
Not 3rd Party Tested
The Bottom Line
Coming in at number 4 on our list is Vitamin D3+K2 by Bronson. We were impressed by its robust dose of 125 mcg of Vitamin D3 and 90 mcg of Vitamin K2.
But there is some confusion over which type of Vitamin K they use in their formulation, which could potentially affect its efficiency.
Additionally, iffy fillers like magnesium stearate are listed as ingredients. This gave us pause, as otherwise the brand rightly deserves praise for offering products that are lab tested, non-GMO, and gluten- & soy-free.
Despite those minor disappointments, their 365-day return policy is one of the best, and helped them secure a spot on our list.
* Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
C+
OVERALL GRADE
PROS
-
25mcg of vitamin D3
-
Low price point
CONS
-
Made with weaker form of vitamin K2 (MK-4)
-
Lacks absorption-boosting fats
-
30-day return policy
The Bottom Line
T-Drive by InnoSupps has a promising formula with the recommended ingredients like ashwagandha and boron. However, it also lacks shilajit.
Potential customers should also take into consideration that InnoSupps only offers a 30-day return policy, which may not be enough time to fully assess the product's effectiveness.
* Results do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.
CITATIONS
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- https://www.powerade.com/products/powerade/fruit-punch
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- http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.836.9353&rep=rep1&type=pdf
- https://www.fda.gov/food/food-additives-petitions/additional-information-about-high-intensity-sweeteners-permitted-use-food-united-states
- https://www.sportsrd.org/wp-content/uploads/2018/11/Whats-In-Your-Sweat.pdf
- https://pubmed.ncbi.nlm.nih.gov/10919961/
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- https://www.ncbi.nlm.nih.gov/books/NBK555956/
- https://ods.od.nih.gov/factsheets/Potassium-HealthProfessional/
