2026's Top 5 Vitamin D3 + K2 Supplements

Compare and choose from the top ranked Vitamin D supplements.

heart health graphic

Important: We’ll show you what to look for and reveal the biggest mistakes shoppers make when choosing a Vitamin D3 + K2 product.

Many people in the USA suffer from Vitamin D deficiency. Vitamin D3 and Vitamin K2 are essential for preventing dangerous issues like heart failure and osteoporosis. Vitamin D3 + K2 supplements are powerful, natural option that many doctors recommend taking to help combat these serious health concerns.

But the hard part is finding a supplement that is high quality and effective. With so many low quality products out there, it can be frustrating to find a Vitamin D3 + K2 product that is worth taking. That’s why we researched and analyzed the top brands to bring you the products that we feel are the absolute best on the market. 

Here is why you should be taking a Vitamin D3 supplement, and how to avoid picking a bad product.

Vitamin D3 + K2 Benefits:

  • Helps Improve Heart Health
  • Helps Boost Bone Health
  • Helps Prevent Calcium Build Up In Arteries
  • Help Support Your Immune System

Vitamin D3 + K2 is a powerful supplement with many great health benefits. But you must avoid certain things so that you do not choose a bad product. Follow these guidelines closely so that you ensure you have a good experience with the supplement you select.

What To Look For In A Vitamin D Supplement

High Dosage of Quality Ingredients

You want to look for at least 10,000 iu of Vitamin D3 per serving. Be careful to make sure that the dosage is actually for Vitamin D3 and not for added ingredients, as some companies will dilute their product with other cheaper ingredients.

Made In The USA and Third Party Tested

Make sure the product you select is actually made in the USA, where we have strict manufacturing quality standards. In addition, you want a supplement that is third-party tested, by an independent laboratory. This will help ensure high quality and safety.

90 Day Guarantee

Try to choose a supplement that offers a 100% money-back guarantee. Look for brands that offer at least a 90-day money-back guarantee.

Fair Return Policy

If you are not happy with your product, it should be easy to return your supplement. Avoid brands that make it very difficult to return a product or get a refund.

Watch Out For:

Fake Amazon Reviews

This is a huge problem. Many of the reviews on Amazon are fake or paid for. The best product does not always have the most reviews. You have to study the ingredients and quality carefully to find the best products. You cannot rely on Amazon reviews alone, and definitely do not choose the lowest cost product on Amazon.

The Lowest Priced Option

This is a matter of your health. It is tempting to go for the lowest price option, but you get what you pay for. You really need to prioritize quality, even if that means paying a little more. Why would you want the cheapest option for something you are taking for your health?

Top 5 Vitamin D3 + K2 Supplements Of 2026

Here is a list of what we think are the top five Vitamin D3 supplements available online.


1. Luma Nutrition D3 + K2[1]

by Luma Nutrition

vitamin d3 k2
9.6/10
OVERALL SCORE *Scores are based on the Luma Nutrition ranking system.
A+
OVERALL GRADE *Grades are based on the Luma Nutrition ranking system.
INGREDIENT SAFETY
97%
9.7/10
PROJECTED EFFECTIVENESS
94%
9.4/10
VALUE
96%
9.3/10
RETURN POLICY
93%
9.3/10

Pros

  • Contains a powerful dose of 10,000iu Vitamin D3 per serving
  • Clinically studied ingredient, recommended by many doctors
  • Good balance between quality and price
  • 90 Day, risk free, money back guarantee

Cons

  • High demand for this product means it can sometimes be out of stock

Overall

We picked Luma Nutrition’s Vitamin D3 + K2 supplement for our top spot because it’s the only supplement that meets our strict criteria.

Luma Nutrition uses a powerful dose of Vitamin D3 and Vitamin K2. It contains 10,000iu of Vitamin D3 per serving, and 200mg of Vitamin K2 per serving.

The ingredients used are high quality and they have 3rd party testing done on every batch of products they produce.

Also, Luma Nutrition has a few different special offers available that give customers a big discount.

Finally, they offer a fair, 90-day, risk-free, money-back guarantee. Most companies won’t do this, which shows how much they stand behind their products. Overall, Luma Nutrition is our top pick.

*Scores and results are based on our ranking system and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.


2. Designs for Health Vit D

by Designs for Health

d3 k2
8.9/10
OVERALL SCORE *Scores are based on the Luma Nutrition ranking system.
B+
OVERALL GRADE *Grades are based on the Luma Nutrition ranking system.
INGREDIENT SAFETY
90%
9.0/10
PROJECTED EFFECTIVENESS
86%
8.6/10
VALUE
87%
8.7/10
RETURN POLICY
89%
8.9/10

Pros

  • Contains quality ingredients
  • Positive reviews
  • Solid brand

Cons

  • Lacks proper dosage
  • Expensive

Overall

Number two on our list is Designs for Health Vitamin D.

This is a well regarded brand, but the biggest problem is that it only contains 5,000iu of Vitamin D3 per serving. We recommend 10,000iu.

The price is also quite high. Definitely a more expensive option.

Overall, Designs for Health Vitamin D does use great ingredients, but falls short on the effective dose to the other products on this list.

*Scores and results are based on our ranking system and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.


3. Metagenics Vitamin D3 + K

by Metagenics

d3 k2
8.4/10
OVERALL SCORE *Scores are based on the Luma Nutrition ranking system.
B
OVERALL GRADE *Grades are based on the Luma Nutrition ranking system.
INGREDIENT SAFETY
86%
8.6/10
PROJECTED EFFECTIVENESS
82%
8.2/10
VALUE
84%
8.4/10
RETURN POLICY
84%
8.4/10

Pros

  • Quality ingredients
  • Solid brand reputation

Cons

  • Only 5,000iu per serving
  • Expensive option

Overall

Number three on our list is Metagenics Vitamin D3 + K2.

Again, this is another brand with a very good reputation for quality. The issue with this product is that the dosage is a bit lower at only 5,000iu of Vitamin D3 per serving.

This one was also the more expensive products we analyzed.

Overall, Metagenics Vitamin D3 + K2 is not too bad, and could be an option if you are willing to spend top dollar. But it falls short when compared to other products on the list.

*Scores and results are based on our ranking system and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.


4. Pure Encapsulations Vitamin D3 & K2

by Pure Encapsulations

d3 k2
8.1/10
OVERALL SCORE *Scores are based on the Luma Nutrition ranking system.
B-
OVERALL GRADE *Grades are based on the Luma Nutrition ranking system.
INGREDIENT SAFETY
81%
8.0/10
PROJECTED EFFECTIVENESS
80%
7.9/10
VALUE
79%
7.9/10
RETURN POLICY
81%
8.1/10

Pros

  • Good brand reputation

Cons

  • Only contains 4,000iu of Vitamin D3 per serving

Overall

Number four on our list is Pure Encapsulations Vitamin D3 + K2.

While this brand does have a good reputation, the biggest problem is that the supplement only contains 4,000iu of Vitamin D3 per serving. We recommend 10,000ius minimum.

In summary, Pure Encapsulations Vitamin D3 + K2 does use quality ingredients, but it ranks lower because of the less potent dosage.

*Scores and results are based on our ranking system and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.


5. PURE SYNERGY D3 + K2

by PURE SYNERGY

d3 k2
8.0/10
OVERALL SCORE *Scores are based on the Luma Nutrition ranking system.
B-
OVERALL GRADE *Grades are based on the Luma Nutrition ranking system.
INGREDIENT SAFETY
80%
7.8/10
PROJECTED EFFECTIVENESS
78%
8.1/10
VALUE
80%
8.0/10
RETURN POLICY
81%
8.1/10

Pros

  • Organic

Cons

  • Lowest dosage of all products we reviewed
  • Capsules with powder instead of softgels

Overall

Number five on our list is Pure synergy D3 + K2.

This product is the only organic option, but there are concerns about the dosage and form factor.

This product has the lowest amount of D3, at only 2,000iu per serving. This product is also a powder in a capsule instead of a softgel. 

We recommend a higher dosage and going with a softgel for better absorption.

In conclusion, Pure synergy D3 + K2 is a good choice if you want organic, but keep in mind you are getting a much lower dosage.

*Scores and results are based on our ranking system and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.

Citations

  1. https://pubmed.ncbi.nlm.nih.gov/31172459/
  2. https://pubmed.ncbi.nlm.nih.gov/32252338/
  3. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7281985/
  4. https://pubmed.ncbi.nlm.nih.gov/32365423/
  5. https://pubmed.ncbi.nlm.nih.gov/33792853/
  6. https://pubmed.ncbi.nlm.nih.gov/36033779/
  7. https://pubmed.ncbi.nlm.nih.gov/34858832/
  8. https://pubmed.ncbi.nlm.nih.gov/38137375/
  9. https://pubmed.ncbi.nlm.nih.gov/31119401/