D3 (1,000 IU) combined with K2 (MK-7).
Vitamin D3 + K2
Available at Nature HeartLaboratory testedFinal products tested in Dr. Born's laboratory
Buy directlywith the partner, without detours
Independentno pharmaceutical company
Benefits, officially confirmed
What D and K are officially recognized for
- Vitamin D contributes to the normal absorption and utilization of calcium and phosphorus.
- Vitamin D contributes to normal blood calcium levels.
- Vitamin D contributes to the maintenance of normal bones, teeth and normal muscle function.
- Vitamin D contributes to the normal function of the immune system.
- Vitamin D plays a role in cell division.
- Vitamin K contributes to normal blood clotting.
- Vitamin K contributes to the maintenance of normal bones.
Vitamin D3 (cholecalciferol) together with vitamin K2 as menaquinone-7, usually as drops in a fatty carrier oil.
At a glance
- Fabrics: Vitamin D3 (cholecalciferol) and vitamin K2 (menaquinone-7)
- Reference values (NRV): 5 mcg vitamin D, 75 mcg vitamin K per day
- What matters at K2: the specification „all-trans MK-7”
- Why a carrier oil: Both vitamins are fat-soluble.
Why form matters in K2: Menaquinone-7 exists in two spatial variants. The all-trans form is the usable one. Inexpensive preparations often contain cis portions without declaring this. The label should therefore explicitly state "all-trans".
How your body absorbs nutrients →
Fact sheet on the nutrient page: Vitamin D3 never works alone →
What's inside
Two vitamins and an oil to transport them. The carrier is usually MCT oil from coconut or olive oil. Capsules have a coating, while drops do not. Vitamin D3 is typically derived from lanolin (wool grease); for vegan preparations, it comes from lichen, which is explicitly stated on the packaging.
How it is taken
Take it with a meal containing some fat. If taken on an empty stomach, some of it remains unused because both vitamins are only absorbed from the intestines with fat. In our latitudes, sunlight is insufficient from October to March to produce vitamin D in the skin. This is precisely why supplementation is necessary.
The German Federal Institute for Risk Assessment recommends a maximum daily intake of 20 µg (800 IU) of vitamin D from dietary supplements. Anyone wishing to take higher doses on a long-term basis should have their 25-OH-D blood level checked beforehand, rather than taking supplements based on suspicion.
Knowledge, figures, research
Why vitamin D is so often scarce in winter, why K2 is the right partner and what research says about it, compactly explained in the nutrient atlas.
Good to know
- One point deserves special mention because it truly matters: Those taking coumarin-type anticoagulants (such as Marcumar, Warfarin, or Phenprocoumon) should only supplement with vitamin K after consulting their doctor. These medications work by affecting vitamin K metabolism, and additional K2 counteracts this effect.
- Vitamin D is fat-soluble. It is best absorbed when consumed with a meal containing some fat.
- If you have elevated calcium levels, kidney stones, or sarcoidosis, consult your doctor beforehand.
- Different dosages apply to children than to adults. Please consult a doctor regarding the dosage.
- Human amounts of vitamin D are toxic to dogs and cats. Keep out of reach.
As always, dietary supplements are a supplement, not a substitute for good food and not a substitute for medical advice. If you are pregnant or breastfeeding, have children, pre-existing medical conditions, or are taking long-term medication, it is advisable to consult your doctor beforehand.
Available from our partner
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Why this partner
Nature Heart
We only recommend manufacturers and distributors that we have reviewed and that do not belong to any pharmaceutical company.
- Laboratory testedFinal products tested in Dr. Born's laboratory
- Organic inspectionInspection body DE-ÖKO-007 for organic products
- DisclosedAnalyses available as PDFs on every product page
- IndependentNo pharmaceutical company behind it
Questions
Frequently Asked Questions
Wo kaufe ich Vitamin D3 + K2?
Directly from Nature Heart. The button above will take you to the partner's product page; shipping and invoicing will be handled by them. The price remains the same for you.
Where can I find figures and studies on this?
In the nutrient atlas: intake, forms in comparison, quantities and sources. To the nutrient atlas →
How do you choose your partners?
We check ownership, origin, organic certification, and, where available, laboratory analyses. We do not accept partners belonging to a pharmaceutical company.
