OstroVit Vitamin D3 4000 + K2 is the brand’s sunshine-stack tablet — cholecalciferol locked with highly available vitamin K2 MK-7 — built for athletes, desk workers and anyone who treats bone, muscle and immune basics like training non-negotiables. Official OstroVit positioning is plain: a high-quality D3 + K2 food supplement in easy-to-swallow tablets when daily diet and daylight are not enough.
The enemy is the lonely low-IU D3 softgel with zero K2, or the multi-tab that whispers “vitamin D” in the dust and never shows a real MK-7 line. Winter Ireland, indoor gym blocks, shift work — you still need calcium handling that actually works. This SKU pairs the sunshine vitamin with menaquinone-7 from Bacillus subtilis natto (traditional Japanese fermented soy route the brand calls out), the MK-7 form OstroVit rates as the most available K2 for the body.
Every label serving is 1/2 tablet and delivers 50 µg vitamin D (2000 IU, 1000% RI) as cholecalciferol plus 50 µg vitamin K (67% RI) as MK-7. That is the clinical card on the import facts panel — not a micro-dosed “support” sprinkle. Vitamin D helps maintain healthy bones and teeth, supports normal muscle function and the immune system, and contributes to normal absorption/utilisation of calcium and phosphorus plus normal blood calcium. Vitamin K contributes to normal blood clotting and helps maintain healthy bones — the authorised claim set the brand leads with on this stack.
About 200 servings in the 100-tablet pack when you run the half-tablet serve — months of daily cover without buying another tub mid-block. Natural-source vitamins on the import copy, zero caffeine, zero flavour dust. Limited sun exposure, hard training, older adults stacking bone support, or anyone who wants D3 and K2 on the same split tablet instead of two bottles fighting for shelf space.
Take 1 serving (1/2 tablet) once daily, 30 minutes before a meal as the import label directs. Keep the fat-soluble stack in the log the same way you keep the lifts — measured, daily, no excuses. If you use vitamin K–antagonist anticoagulants (warfarin/acenocoumarol class), this is not your product — brand warning stands.
2000 IU D3. 50 µg K2 MK-7. Half tablet. Daily.
How to Use
- Take 1 serving (1/2 tablet) once daily.
- Consume 30 minutes before a meal with water.
- Do not exceed 1/2 tablet (one serving) per day unless a qualified professional advises otherwise after bloodwork.
Food supplement for healthy adults. Do not exceed the recommended daily dose. It is advisable to check 25-(OH)D status with a doctor or pharmacist before high-dose vitamin D use. Store tightly closed in a dry place at 15–25°C, away from direct sunlight.
Ingredients
Active / formula
| Vitamin D | 50 µg (2000 IU) (1000% RI) |
| Vitamin K | 50 µg (67% RI) |
Other ingredients
Bulking agents: microcrystalline cellulose, calcium phosphate, starch; anti‑caking agents: magnesium salts of fatty acids, silicon dioxide; menaquinone‑7 (vitamin K) from Bacillus subtilis natto, cholecalciferol (vitamin D).
Manufactured in a facility that uses ingredients derived from fish.
Always check the product packaging for the definitive ingredient list. Vitamin K2 as menaquinone-7 (MK-7) from Bacillus subtilis natto fermentation.
Supplement Facts
| Vitamin D | 50 µg (2000 IU) (1000% RI) |
|---|---|
| Vitamin K | 50 µg (67% RI) |
Warnings
Do not exceed the recommended daily dose. Do not use the product as a substitute (replacement) for a varied diet. A balanced diet and healthy lifestyle are recommended.
Do not ingest if you are allergic to any of the ingredients. Do not consume the product by children, pregnant or nursing women. Keep out of the reach of children.
Product should not be used by people taking anticoagulants containing vitamin K antagonists (e.g. warfarin and acenocoumarol).
Manufactured in a facility that uses ingredients derived from fish.
Keep this packaging tightly closed in a dry place, at a temperature of 15–25°C. Keep out of direct sunlight. Manufacturer: OstroVit Sp. z o.o., ul. Sitarska 16, 18-300 Zambrów, Poland.
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