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OstroVit

Vitamin D3 4000 IU + K2 100 tabs

Regular price €6,00 EUR
Regular price €9,95 EUR Sale price €6,00 EUR
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€0,06 per dose · 100 days supply
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How long will it last?

Two weeks before you run out. The reminder is only stored in your own calendar.

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Vitamin D3 100 µg (4000 IU) and vitamin K2 (MK-7) 100 µg per tablet. One tablet a day; one pack lasts 100 days.

Two fat-soluble vitamins in one tablet: vitamin D3 as cholecalciferol and vitamin K2 as menaquinone-7 (MK-7) from Bacillus subtilis natto.

Vitamin D contributes to the maintenance of normal bones. Vitamin K contributes to the maintenance of normal bones.

  • Vitamin D3 100 µg (4000 IU) per tablet (2000% RI)
  • Vitamin K2 as MK-7: 100 µg per tablet (133% RI)
  • 1 tablet a day: 100 tablets = 100 days
  • Made in the EU (Poland); certificate of analysis per batch via coa@suppstore.com
  • Form: vitamin D3 as cholecalciferol and vitamin K2 as menaquinone-7 (MK-7)

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Product info

Vitamin D and K2 are among the most researched micronutrients in modern nutrition science. The European Food Safety Authority EFSA has assessed both vitamins. Vitamin D contributes to the maintenance of normal bones. Vitamin D contributes to the normal function of the immune system. Vitamin K contributes to the maintenance of normal bones. The K2 in this tablet is MK-7 (menaquinone-7), obtained by fermentation with Bacillus subtilis natto.

Between October and March, your skin at our latitude hardly makes any vitamin D. The sun is too low, you wear more clothes, and even a walk in the midday sun yields little. That is why we see this combination on the bedside tables of people who get little sun outdoors, of people who consciously look after their routine all year round, and of adults who take their daily basics seriously. One tablet provides 100 µg vitamin D3 (4000 IU, 2000% RI) and 100 µg vitamin K2 as MK-7 (133% RI); a pot of 100 tablets lasts 100 days. It is a routine that suits anyone who feels responsible for their own health basics — not as a quick fix, but as a consistent building block.

Every batch is produced in a certified EU facility (Poland) under strict quality control; request the certificate of analysis per batch via coa@suppstore.com. The cholecalciferol is obtained from lanolin (sheep wool grease) by UV irradiation — the same photochemical process that takes place in the skin under sunlight. The MK-7 is fermented from Bacillus subtilis natto, the same bacterium that produces traditional Japanese natto. Both ingredients are independently tested for purity and content before they go into the tablet.

Form: vitamin D3 as cholecalciferol and vitamin K2 as menaquinone-7 (MK-7).

Why this product?

  • Vitamin D3 100 µg (4000 IU) per tablet (2000% RI)
  • Vitamin K2 as MK-7: 100 µg per tablet (133% RI)
  • 1 tablet a day: 100 tablets = 100 days
  • Vitamin D contributes to the maintenance of normal bones
  • Made in the EU (Poland), CoA per batch on request
  • Vitamin D3 as cholecalciferol and vitamin K2 as menaquinone-7 (MK-7)

Ingredients & dosage

Vitamin D3 (cholecalciferol): 100 µg / 4000 IU per tablet — 2000% RI

You normally get vitamin D from sunlight or oily fish. One tablet provides 100 µg (4000 IU) vitamin D3.

Vitamin K2 as MK-7 (from Bacillus subtilis natto): 100 µg per tablet — 133% RI

MK-7 occurs naturally in natto: fermented soybeans from Japan. Most people find its taste and smell unappealing, to put it mildly. Here the MK-7, obtained by fermentation with Bacillus subtilis natto, comes in a tasteless tablet.

How it works

Bones and teeth

  • Vitamin D contributes to the maintenance of normal bones
  • Vitamin D contributes to the maintenance of normal teeth
  • Vitamin K contributes to the maintenance of normal bones

Immune system

  • Vitamin D contributes to the normal function of the immune system

Calcium balance

  • Vitamin D contributes to normal absorption/utilisation of calcium and phosphorus
  • Vitamin D contributes to normal blood calcium levels

Muscle function

  • Vitamin D contributes to the maintenance of normal muscle function

Blood clotting

  • Vitamin K contributes to normal blood clotting

Cell division

  • Vitamin D has a role in the process of cell division

Per daily dose (1 tablet): Vitamin D3 (cholecalciferol) 100 µg (4000 IU) (2000% RI); vitamin K2 (menaquinone-7, MK-7) 100 µg (133% RI). Each nutrient named is well above the legal threshold of 15% of the reference intake.

This product is positioned around vitamin D3 and K2 together in one tasteless tablet: 100 µg D3 (4000 IU, 2000% RI) and 100 µg K2 as MK-7 (133% RI), one tablet a day, 100 days per pot, made in the EU with a certificate of analysis per batch.

Why do you read so little about the effect of this product?

That is not down to us, but to European law. For food supplements we may only use health claims that have been officially approved by the EU.

The result? We can often tell you less than we would like to based on research, tradition and experience. That is how strict the rules are.

Questions about this product? Our customer service is happy to help – with the ingredients, the use or how to fit it into your daily routine. We think along with you and explain everything clearly, within the room the law gives us.

How to take

  • Adults: 1 tablet a day with water, preferably with a meal containing fat
  • 100 tablets = 100 days
  • Do not exceed the recommended daily dose
  • Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle
  • Keep out of reach of young children
  • Not for children, pregnant or breastfeeding women without medical advice
  • Taking medication? Consult your doctor or pharmacist first
  • Provides 100 µg vitamin D per daily dose: do not combine with other supplements containing vitamin D without medical advice.
  • Contains vitamin K: if you take blood thinners (anticoagulants), consult your doctor first.
  • Storage: 15-25 °C, dry, in the original closed packaging, away from sunlight

Specifications

  • Product category: food supplement
  • Brand: OstroVit
  • Form: tablets
  • Contents: 100 tablets
  • Directions: 1 tablet a day with water, preferably with a meal containing fat
  • Per daily dose (1 tablet): Vitamin D3 (cholecalciferol) 100 µg (4000 IU) (2000% RI); vitamin K2 (menaquinone-7, MK-7) 100 µg (133% RI)
  • Lasts: 100 days
  • Allergens: produced in a facility that processes fish (according to the manufacturer)
  • Suitable for: adults
  • Origin: made in the EU (Poland)
  • Storage: 15-25 °C, dry, in the original closed packaging, away from sunlight
  • Best before and batch number: on the packaging
  • EAN: 5903246220278
  • Certificate of analysis (CoA): per batch on request via coa@suppstore.com
  • Returns: 100-day money-back guarantee, free returns

Composition

Per daily dose (1 tablet)
Vitamin D3 (cholecalciferol): 100 µg (4000 IU) · 2000% RI*
Vitamin K2 (menaquinone-7, MK-7): 100 µg · 133% RI*

Ingredients
Microcrystalline cellulose; starch; cholecalciferol (vitamin D3); menaquinone-7 (MK-7) from Bacillus subtilis natto; silicon dioxide.

Allergens
Produced in a facility that processes fish (according to the manufacturer).

100 tablets · serving 1 tablet
*RI = reference intake (Regulation (EU) No 1169/2011).

Frequently asked questions (FAQ)

How do I take the D3+K2 tablets and how long does a pack last?

Take 1 tablet a day with water, preferably with a meal containing fat.

One pack contains 100 tablets. At 1 tablet a day that is 100 days.

What allergen information does the manufacturer give for the D3+K2 tablets?

Allergens: produced in a facility that processes fish (according to the manufacturer).

What is in one D3+K2 tablet?

Per daily dose (1 tablet): Vitamin D3 (cholecalciferol) 100 µg (4000 IU) (2000% RI); vitamin K2 (menaquinone-7, MK-7) 100 µg (133% RI).

The full ingredient list is in the Composition tab.

Why D3 and not D2, and why K2 as MK-7?

This product contains vitamin D3 as cholecalciferol and vitamin K2 as menaquinone-7 (MK-7). In supplements, vitamin D is used as D3 (cholecalciferol) or D2 (ergocalciferol); vitamin K as K1 (phylloquinone) or K2 (menaquinones, such as MK-7).

All these forms are permitted in food supplements in the EU. We make no statements about differences in effect.

What is MK-7 in the D3+K2 tablets?

MK-7 is menaquinone-7, a form of vitamin K2. In this product it comes from Bacillus subtilis natto. One tablet contains 100 µg vitamin K2 (MK-7), which is 133% RI.

Why are vitamin D3 and K2 combined in one tablet?

This way you take both vitamins with one tablet a day. The EU health claims further down in this FAQ apply to each vitamin separately; there is no separate claim for the combination.

How many µg is 4000 IU of vitamin D3 in the D3+K2 tablets?

IU (international unit) and µg are two ways of stating the same amount of vitamin D: 1 µg = 40 IU. One tablet contains 100 µg vitamin D3, which is 4000 IU.

Isn't 4000 IU of vitamin D3 per D3+K2 tablet too much?

The reference intake (RI) for vitamin D is 5 µg a day. One tablet provides 100 µg (4000 IU), which is 2000% RI.

EFSA has set a tolerable upper intake level (UL) for adults of 100 µg vitamin D a day, from all sources combined. Stick to 1 tablet a day.

What is the difference between D3+K2 and vitamin D3 alone?

Besides vitamin D3, this product also contains vitamin K2: 100 µg MK-7 per tablet. If you only want vitamin D3, a single D3 supplement is an alternative.

Which EU health claims apply to OstroVit Vitamin D3 4000 IU + K2?

These are the health claims the EU has authorised for the vitamins in this product:

  • Vitamin D contributes to the maintenance of normal bones
  • Vitamin D contributes to the maintenance of normal teeth
  • Vitamin K contributes to the maintenance of normal bones
  • Vitamin D contributes to the normal function of the immune system
  • Vitamin D contributes to normal absorption/utilisation of calcium and phosphorus
  • Vitamin D contributes to normal blood calcium levels
  • Vitamin D contributes to the maintenance of normal muscle function
  • Vitamin K contributes to normal blood clotting
  • Vitamin D has a role in the process of cell division

How do I know OstroVit Vitamin D3 4000 IU + K2 contains what the label says?

Made in the EU (Poland). The certificate of analysis (CoA) is available per batch on request via coa@suppstore.com. State the EAN (5903246220278) or the batch number on your packaging and we will send the certificate for your batch.

How should I store the D3+K2 tablets and what is the shelf life?

Storage: 15-25 °C, dry, in the original closed packaging, away from sunlight.

The best-before date and the batch number are on the packaging.

How is my order shipped?

Every order ships with Track & Trace, so you can follow your parcel. You will see the shipping costs and the expected delivery time for your address before you pay.

How can I pay?

You pay safely with 20+ trusted payment methods on a secure payment page.

Can I return my order?

Yes. You have a 100-day money-back guarantee: return products within 100 days and you get your money back. Returns are free. For hygiene reasons, we do not accept opened packaging. Read our refund policy.

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