Why Vitamin D3 and K2 Belong Together
Vitamin D3 and Vitamin K2 are often taken together – and for good reason. Both vitamins work closely together in the body and complement each other's functions. Those who supplement only one of the two may be missing out on potential benefits.
Approved Health Claims (HCVO)
According to the European Health Claims Regulation (HCVO/EC No. 1924/2006), the following statements are officially approved:
Vitamin D3 contributes to:
- Normal function of the immune system
- Normal absorption and utilisation of calcium and phosphorus
- Maintenance of normal bones
- Maintenance of normal teeth
- Maintenance of normal muscle function
- Normal cell division
Vitamin K2 contributes to:
- Normal blood clotting
- Maintenance of normal bones
⚠️ Note: All other health claims are not permitted in the EU unless they are covered by the HCVO.
Vitamin D3: The Sunshine Vitamin
Vitamin D3 (Cholecalciferol) is formed in the skin by sunlight – more precisely by UV-B radiation. In the autumn and winter months, however, sunlight in Germany is not sufficient to cover the demand. According to the Robert Koch Institute (RKI), around 38% of adults in Germany do not have sufficient vitamin D.
| Food |
Vitamin D per 100g |
| Herring (smoked) |
~27 µg |
| Salmon (cooked) |
~16 µg |
| Tuna (in oil) |
~6 µg |
| Mushrooms (UV-treated) |
~5–10 µg |
| Egg yolk |
~5 µg |
The recommended daily intake by the DGE is 20 µg (800 IU) for adults – which is hardly achievable through diet alone.
Vitamin K2: The Underestimated Partner
Vitamin K2 (Menaquinone, MK-7) is less known than D3 but plays an important role in the body. It contributes to normal blood clotting and the maintenance of normal bones.
| Food |
Vitamin K2 per 100g |
| Natto (fermented soybeans) |
~1,000 µg |
| Aged hard cheese |
~50–80 µg |
| Gouda |
~20–75 µg |
| Butter (pasture-fed) |
~15 µg |
| Chicken liver |
~14 µg |
The best natural source of K2 is Natto – but it is hardly widespread in Germany. For most people, targeted supplementation is therefore advisable.
Why D3 and K2 are Combined
Vitamin D3 promotes the absorption of calcium from the intestine. Vitamin K2 contributes to normal blood clotting and the maintenance of normal bones. Both vitamins are therefore often offered together in one preparation – as is the case with our product.
Who Has an Increased Need?
-
People in northern latitudes – little sunlight from October to March
-
Elderly people – vitamin D synthesis in the skin decreases
-
People with dark skin color – lower D3 synthesis with the same sun exposure
- People who spend little time outdoors
-
Vegans – K2 is mainly found in animal products
Our Vitamin D3 + K2 Product
Our bestseller provides per daily dose (1 capsule):
- Vitamin D3: 140 µg (5,600 IU)
- Vitamin K2: 200 µg (MK-7)
✅ High-dose | ✅ 100% vegan | ✅ Made in Germany | ✅ 180 capsules (6-month supply)
Vitamin D3 contributes to the normal function of the immune system and the maintenance of normal bones. Vitamin K2 contributes to normal blood clotting and the maintenance of normal bones.
Dosage: How Much D3 and K2 per Day?
Vitamin D3:
- DGE recommendation: 20 µg (800 IU) daily
- Fat-soluble: best taken with a fatty meal
Vitamin K2:
- Recommended daily dose: 70–200 µg
- MK-7 is considered particularly long-lasting in the blood (half-life ~72 hours)
⚠️ Note: If you are taking blood thinners (e.g. Marcumar/Warfarin), please consult a doctor before taking Vitamin K2.
Frequently Asked Questions
Can Vitamin D3 be overdosed?
Vitamin D3 is fat-soluble and can accumulate in the body. With very high continuous doses (over 100 µg/day over a longer period), an oversupply can occur. With normal supplementation within the recommended range, the risk is low.
When is the best time to take it?
In the morning or at lunchtime with food – Vitamin D3 is fat-soluble and is better absorbed with fat.
How long should D3 + K2 be taken?
During the winter months (October–March), daily supplementation is advisable for most people in Germany. In summer, it can be paused depending on sun exposure.
Conclusion
Vitamin D3 and K2 are two of the most important micronutrients that many people in Germany do not get enough of through their diet. Vitamin D3 contributes to the normal function of the immune system and the maintenance of normal bones. Vitamin K2 contributes to normal blood clotting and the maintenance of normal bones.
👉 Discover our Vitamin D3 + K2 – 5,600 IU D3 + 200 µg K2, vegan, Made in Germany.
This article is for general information purposes only and does not replace medical advice.
