Best Vitamin D3 and K2 Supplements UK

Did you know that around 1 in 6 adults in the UK have low levels of vitamin D? As the majority of us are already aware of, vitamin D supports bone strength, immunity and overall well being. Yet many people may not be getting enough, especially during the winter months. That’s why vitamin D supplements, particularly vitamin D3, have become a popular daily essential.

Now to talk about vitamin K2, it is usually found in animal-based foods and greatly contributes to health. Combining vitamin D3 with K2 may offer added benefits. Together, this pair, often called a D3K2 vitamin, may help the body absorb calcium more efficiently and direct it to the bones. With so many products on the market, finding the best vitamin D3 and K2 supplements UK wide can feel a bit difficult. Keep reading to know more about our top-pick in 2025 to help you make a more confident choice.

Why Take Vitamin D3 and K2 Together?

According to research, vitamin D plays a key role in producing proteins that regulate calcium levels in the body. However, these proteins require vitamin K2 to become active. Without adequate K2, calcium may not be effectively directed to the bones, and instead, it could accumulate in soft tissues or arteries, potentially impacting both bone and cardiovascular health.

So, what is D3K2 good for? Taking vitamin D3 alongside vitamin K2 may help:

Enhance calcium absorption and ensure it’s directed to your bones
Reduce the risk of calcium buildup in soft tissues or arteries
Support overall bone strength and cardiovascular function

A study published in 2017 further supported the idea that combining vitamin D3 and K2 may offer a more balanced approach to calcium metabolism compared to taking vitamin D3 alone. This combination may be particularly beneficial for those using supplements long-term or individuals at risk of vitamin D deficiency.

Together, vitamin D3 and K2, often referred to as vitamin D3K2, are gaining attention for their potential health benefits. In simple terms, this nutrient pair may help your body manage calcium more effectively, promoting stronger bones while supporting heart health.

What to Look for in a Quality D3K2 Supplement

If you're exploring vitamin D and K supplements, understanding what makes a D3K2 formula effective and appropriate is important, especially for long-term use. D3K2 vitamins typically combine vitamin D3 (cholecalciferol) and vitamin K2 (menaquinone), both of which play important roles in calcium regulation and musculoskeletal health.

Here’s what to look for while in search of the best vitamin D3 and K2 supplements UK:

Evidence-Based Dosages

A well-formulated supplement should provide safe, evidence-backed amounts of both nutrients:

Vitamin D3: The typically recommended dosage of vitamin D is 10 micrograms (400 IU). However, certain individuals such as those with limited sun exposure may require higher intakes based on clinical guidance.
Vitamin K2 (MK-7): While there’s currently no official reference nutrient intake for vitamin K2 specifically, studies suggest doses of 180 micrograms (µg) of vitamin K2 in the form of MK-7 may support bone health.

However, it is always best to speak with your healthcare provider before starting a new supplement routine, particularly if you are taking other medications, or have any underlying health conditions, or are unsure what is D3K2 vitamin and whether it’s suitable for your individual needs.

Third-Party Testing and Manufacturing Standards

Look for D3K2 vitamins manufactured in GMP-certified facilities and ideally tested by independent laboratories. This helps ensure the product meets safety, quality, and potency standards. You may also look for high-strength vitamin D3 K2 UK supplements that are gluten and allergen free along with ISO certification to ensure quality. It is ideal to prefer formulas free from artificial additives, synthetic colours, or unnecessary binders.

Best Vitamin D3 and K2 Supplement in the UK [2025 Edition]

When it comes to keeping your body healthy, vitamin D3 and vitamin K2 play an important role in supporting strong bones, a healthy heart, and a strong immune system. Together, these vitamins may work well to help your body use calcium properly. They might help in making sure that calcium is absorbed the right way and sent to where it's needed most, like your bones, while also stopping it from building up in places where it shouldn't, like your arteries.

If you're looking for the best vitamin D3 and K2 supplements UK, choosing a high-quality D3K2 supplement is key. It can make a big difference in how your body absorbs and uses these important vitamins. Here’s our top pick for the best K2 D3 supplement to help you stay healthy!

Charava Vitamin D3 (4000 IU) + K2 (MK-7)

You might have definitely come across Charava while exploring the best vitamin D3 and K2 supplements reviews UK. Charava Vitamin D3 (4000 IU) + K2 (MK-7) combines high-strength vitamin D3K2 in a once-daily, vegan-friendly formula designed to support bone strength, and overall wellness.

Vitamin D3 (cholecalciferol) helps the body absorb calcium effectively, while vitamin K2 (MK-7) ensures that calcium is directed rightly. This synergistic action is what makes a combined D3K2 vitamin so valuable for daily supplementation.

Why We Recommend Charava D3 + K2:

Clinically Informed Doses: Delivers 4000 IU of vitamin D3 and 100µg of vitamin K2 MK-7. These dosages are widely accepted to support bone health and calcium metabolism.
Supports Bone & Heart Health: Helps maintain normal bone density while supporting vascular function by guiding calcium away from arteries.
Vegan, Clean Formula: Non-GMO, gluten-free, and free from artificial additives, suitable for vegans and those with dietary sensitivities.
High Bioavailability: Includes MK-7, the most active and long-lasting form of K2, for extended support throughout the day.
Trusted by UK Consumers: Frequently featured in best vitamin D3 and K2 supplements reviews for its purity, potency, and UK-based formulation standards.

Charava’s vitamin D3K2 supplement is a top choice especially for anyone looking to improve their health. However, if you want to know more about what is vitamin D3K2 good for and to get a personalised guidance, consult a healthcare professional.

How Much Vitamin D3 and K2 Should You Take?

If you're asking how much D3K2 per day is right for you, it’s important to remember that the ideal dosage can vary depending on your age, health, and lifestyle. Most vit D3K2 supplements combine these two nutrients in balanced amounts to support bone and heart health.

While official recommendations for vitamin D exist, there is currently no specific daily intake guideline for vitamin K2. That’s why many people choose supplements that offer a thoughtful combination of both.

For personalised recommendations, especially if you’re taking other medications or managing a health condition, it’s always a good idea to speak with your healthcare provider. They can help you determine how much vitamin D3 K2 you should take daily based on your individual needs.

Are There Any Side Effects of D3K2 Supplements?

Many people take vitamin D and vitamin D3 supplements to support their bones, immunity, and general well-being. But like all supplements, it's important to understand potential side effects and how to take them safely. For most healthy individuals, D3K2 supplements are well-tolerated when taken at recommended doses. However, taking excessive amounts, especially of vitamin D3, may lead to an upset stomach, vomiting and weakness.

These effects are typically linked to long-term overuse or very high doses of vitamin D (far above the NHS recommended 10 micrograms or 400 IU daily). Vitamin K2 is considered safe and has a low risk of toxicity, even at higher intakes.

Note: To know more about the benefits of D3K2, it’s best to talk to your healthcare professional. Before starting a new vitamin D3 and K2 routine get a consultation, especially if you have underlying health conditions or are taking medications.

The End Note

Finding the best vitamin D3 and K2 supplements UK wide can make a real difference in supporting your bone, heart, and immune health. For anyone wondering what does D3K2 do, a well-formulated supplement may help your body absorb calcium efficiently. Now that you know what is vitamin D3K2 and how it works, you can make a more confident choice about your daily supplementation routine.

If you're ready to take the next step in your health journey, explore more supplements with Charava, the trusted UK brand committed to clean, effective, and science-backed formulas.

Frequently Asked Questions

Which is the best brand of vitamin D3 with K2?
If you are looking for the best vitamin D3 and K2 supplements UK, Charava is a good choice. Its high-strength D3K2 formula, clean ingredients, and UK-based quality standards make it a better option among others.
Can you take vitamin D3 and vitamin K2 together?
Yes, taking them together may support better calcium absorption and bone health, as they work synergistically.
What is the best source of vitamin D3 and K2?
Vitamin D3 is best obtained from sunlight and fortified foods, while K2 is commonly found in pasteurized eggs, kale, broccoli and supplements.
Is vitamin D3 and K2 worth it?
For those with low sun exposure or at risk of deficiency, a D3K2 supplement may support bone, heart, and immune health.

Disclaimer:
The content provided on this website is for informational purposes only and is not intended as a substitute for advice from a qualified healthcare professional. It should not be used to diagnose, treat, cure, or prevent any disease or health condition.

Always consult your doctor or a qualified healthcare provider before starting any new supplement, diet, or health programme—especially if you are pregnant, nursing, taking medication, or have a medical condition.

The statements made regarding specific supplements and products have not been evaluated by the Medicines and Healthcare products Regulatory Agency (MHRA), the Food and Drug Administration (FDA), or any other medical body. Individual results may vary.

This website does not provide medical or professional health advice. All use of the site and its content is at your own risk.

Product claims, reviews, and descriptions should be viewed as anecdotal and not as guarantees of outcome. Always follow the label instructions, and discontinue use if any adverse reaction occurs.