In short: Vitamin K2 (menaquinone) is a member of the vitamin K family: a fat-soluble vitamin found mainly in fermented foods and some animal products, such as aged cheeses. Vitamin K contributes to normal blood clotting and to the maintenance of normal bones, which is why it is often offered together with vitamin D3.
Edited by: Vitafoodonline.hu editorial team · Last updated: October 21, 2026
Contents
- Why does the body need vitamin K?
- What forms are there: K1 or K2?
- Why is K2 offered together with vitamin D3?
- Who may want to pay attention to their vitamin K intake?
- What to look for when buying vitamin K2
- Comparison of our products containing vitamin K2
- Related products
- Frequently asked questions
- Ordering vitamins K2 and D3 from Vitafoodonline.hu
Why Does the Body Need Vitamin K?
Vitamin K takes its name from the German word "Koagulation" (blood clotting), which reflects one of its best-known roles. According to the health claims authorized in the European Union, vitamin K:
- contributes to normal blood clotting;
- contributes to the maintenance of normal bones.
These claims apply to vitamin K in general, so to both the K1 and K2 forms. Vitamin K is fat-soluble, so liquid food supplements typically contain it dissolved in oil.
What Forms Are There: K1 or K2?
There are two main natural forms of vitamin K:
- Vitamin K1 (phylloquinone): found mainly in green leafy vegetables – spinach, kale, broccoli.
- Vitamin K2 (menaquinones): this group includes several subforms, abbreviated as MK-4, MK-7 and so on. It occurs mainly in fermented foods (for example natto, a Japanese fermented soybean dish), aged cheeses and some foods of animal origin, and it is also produced by gut bacteria.
In food supplements, vitamin K2 appears less often on its own and much more often combined with vitamin D3 – as drops, capsules or as part of multi-ingredient powders focused on bones. Labels state the amount of vitamin K2 in micrograms (µg).
Vitamin Finder – free, 1 minute
D3 + K2 drops or separate products? Based on 5 short questions, we recommend 2–3 in-stock products – by age, goal, form and budget.
Why Is K2 Offered Together with Vitamin D3?
Vitamin D contributes to normal absorption/utilization of calcium and phosphorus and to the maintenance of normal bones. Vitamin K also carries the authorized claim that it contributes to the maintenance of normal bones. Because both are fat-soluble vitamins, they can be conveniently combined in a single oil-based drop, so one product provides both ingredients.
You can read more about vitamin D3 – its forms and who may want to pay attention to it – on our separate glossary page. Magnesium also contributes to the maintenance of normal bones, which is why it is often included in such combinations as well.
Who May Want to Pay Attention to Their Vitamin K Intake?
- people who rarely eat green leafy vegetables, fermented foods or aged cheeses;
- people who take vitamin D3 and are looking for a combined product;
- people who want to simplify their daily routine and get the two fat-soluble vitamins from one product.
Important: vitamin K also plays a role in blood clotting. If you take medication that affects blood clotting, be sure to talk to your doctor before taking a food supplement containing vitamin K. During pregnancy and breastfeeding, and for children, also ask a doctor or pharmacist for advice.
What to Look for When Buying Vitamin K2
- Form: the label shows whether the product contains vitamin K1 or vitamin K2 (menaquinone, possibly marked MK-7).
- Amount and NRV%: check how many µg of vitamin K one serving provides and what percentage of the nutrient reference value it covers.
- Combination: for a D3+K2 product, check the amount of both vitamins; do not exceed the recommended daily dose.
- Carrier: liquid forms are typically an oil-based solution (for example, olive oil).
- Age and allergens: check from what age the product can be given, and whether it is gluten-free, lactose-free and sugar-free.
Comparison of Our Products Containing Vitamin K2
The table below lists the MARNYS products containing vitamin K2 that are currently in stock, plus the standalone vitamin D3 drops for comparison.
| Product | Form | Size | For whom |
|---|---|---|---|
| Marnys Vitamin K2 and D3 Drops | Liquid drops, K2 and D3 in extra virgin olive oil | 30 ml | For children aged 7 and over and for adults, also during pregnancy and breastfeeding |
| Marnys Artrohelp Marine | Vanilla-flavored powder with fish collagen, calcium, magnesium, vitamin D3 and vitamin K2 | 350 g | For adults |
| Marnys Vitamin D3 Drops (without K2) | Liquid drops, vitamin D3 in olive oil | 30 ml | For children from infancy and for adults |
Related Products
- Marnys Vitamin K2 and D3 Drops – vitamins K and D in one oil-based drop dosed with a dropper; gluten-free and lactose-free.
- Marnys Artrohelp Marine – a multi-ingredient powder you can stir into yogurt, containing calcium, magnesium, vitamin D3 and vitamin K2 in addition to fish collagen.
- Marnys Vitamin D3 Drops – standalone vitamin D3 drops for those looking for a product without vitamin K2.
Vitamin K2 and D3 Drops
Oil-based drops with vitamins D3 and K2, in an easy-to-dose form. Orders over 50,000 HUF get a 5% cart discount.
Frequently Asked Questions
What is the difference between vitamin K1 and vitamin K2?
Both belong to the vitamin K family. Vitamin K1 (phylloquinone) is found mainly in green leafy vegetables, while vitamin K2 (menaquinones) occurs mainly in fermented foods and aged cheeses. The authorized health claims apply to vitamin K in general.
What does the MK-7 label mean?
MK is short for menaquinone, and the number refers to the length of the molecule's side chain. MK-7 is one subform of vitamin K2 and is often listed on food supplement labels.
Why do some products contain both vitamin D3 and vitamin K2?
Both vitamins carry the authorized claim that they contribute to the maintenance of normal bones, and both are fat-soluble, so they can be conveniently combined in one oil-based drop.
Can I take vitamin K2 if I take medication that affects blood clotting?
Vitamin K plays a role in blood clotting, so if you take such medication, only take a food supplement containing vitamin K after consulting your doctor.
How much vitamin K2 is needed per day?
Please follow the dosage stated on the packaging and do not exceed the recommended daily dose. For personalized advice, consult your doctor or pharmacist.
Ordering Vitamins K2 and D3 from Vitafoodonline.hu
Order conveniently from the Vitafoodonline.hu webshop! Choose from our D3+K2 drops and multi-ingredient products focused on bones – you will find our full range in our MARNYS vitamins and food supplements category. We offer a volume discount on orders of 10 items or more, in-stock products are shipped with next-day delivery available, and our loyalty program lets you save even more with every purchase. Orders over 50,000 HUF get a 5% cart discount, and GLS shipping is free over 20,000 HUF. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle.
