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Osavi Vitamin D3 + K2 delivers two essential fat-soluble nutrients — vitamin D3 (cholecalciferol) and vitamin K2 (menaquinone-7 MK-7) — in one softgel for optimal bone, muscle and cardiovascular support.
Each formulation combines science-backed dosages of D3 (2000 IU or 4000 IU) with K2 (100 µg or 150 µg), suspended in cold-pressed olive oil for superior absorption and stability.
Dual Synergy for Calcium Metabolism
Vitamin D3 aids normal calcium absorption, while K2 (MK-7) guides calcium into bones and teeth — supporting skeletal integrity and arterial flexibility.
Bioactive and Stable Forms
Features natural cholecalciferol (D3) and highly bioavailable menaquinone-7 (K2), the clinically validated form with a long half-life for sustained activity.
Enhanced Absorption with Olive Oil
Each softgel is oil-based, ensuring maximum uptake of these fat-soluble nutrients without requiring co-ingestion of fatty meals.
Tailored Potency Options
Choose between 2000 IU D3 + 100 µg K2 or 4000 IU D3 + 150 µg K2, in bottles of 60 or 120 softgels — ideal for individual needs and long-term maintenance.
European Quality & Testing
Produced in the EU under GMP and ISO 22000 standards. Non-GMO, gluten-free, and third-party tested for purity and potency.
| Ingredient | Amount (2000 IU / 4000 IU Formula) | Function |
|---|---|---|
| Vitamin D3 (Cholecalciferol) | 50 µg (2000 IU) / 100 µg (4000 IU) | Supports calcium absorption, bone & immune health |
| Vitamin K2 (Menaquinone-7 MK-7) | 100 µg / 150 µg | Directs calcium into bones, maintains vascular elasticity |
| Olive Oil (base) | — | Improves bioavailability |
| Capsule Shell | Gelatin, Glycerin, Purified Water | Softgel matrix |
Free from: Gluten, lactose, soy, GMOs, and artificial preservatives.
Certifications: GMP | ISO 22000 | Non-GMO | Third-Party Tested | EU Manufactured
Clinical studies confirm the complementary role of D3 and K2 in calcium metabolism.
Vitamin D raises calcium availability; K2 ensures its proper distribution within bones, reducing the risk of soft-tissue calcification and promoting bone mineral density.
• Bone mineralisation and calcium homeostasis
• Vascular and arterial health
• Muscle performance and strength
• Age-related bone support
• Immune modulation during low sunlight periods
For references, search “Vitamin D3 + K2 MK-7 synergy clinical trial” on PubMed or Cochrane Library.
• Bone and joint maintenance in adults and elderly
• Winter and low-sunlight conditions
• Support during reduced mobility or training periods
• Adjunct to calcium and magnesium intake
Formats: 2000 IU + 100 µg | 4000 IU + 150 µg
Pack Sizes: 60 or 120 softgels
Base Oil: Cold-Pressed Olive Oil
Origin: Poland (EU)
Manufacturer: Osavi Sp. z o.o.
Certifications: GMP / ISO / HACCP
Take 1 softgel daily with a main meal containing fat or as directed by your health professional.
Do not exceed the recommended intake. Suitable for adults.
• Store at 15–25 °C in a dry place.
• Avoid direct sunlight and heat.
• Do not refrigerate.
• Keep out of reach of young children.
Consult a doctor before use if you:
• Take anticoagulant medication (e.g. warfarin).
• Are pregnant or breastfeeding.
• Use other vitamin D or K supplements.
Food supplements should not replace a varied diet and healthy lifestyle.
Why combine D3 and K2?
D3 increases calcium absorption; K2 ensures it is used correctly by bones and not soft tissues.
Which strength should I choose?
• 2000 IU + 100 µg – ideal for daily maintenance.
• 4000 IU + 150 µg – suitable for low vitamin D levels or winter use under guidance.
Is this product vegan?
No – D3 is sourced from lanolin (wool fat). A vegan lichen-based version is available separately.
Does it contain artificial additives?
No – Osavi uses clean label ingredients with olive oil as the carrier.
• PubMed – “Vitamin D3 + K2 MK-7 bone density study”
• Google Scholar – “D3 and K2 interaction in calcium metabolism”
• ClinicalTrials.gov – “Vitamin K2 MK-7 long-term supplementation research”
This product is a food supplement, not a medicine.
It is not intended to diagnose, treat, cure or prevent disease.
Information complies with UK and EU Nutrition and Health Claims Regulation (EU 1924/2006).
Please read before purchase. The information provided regarding dietary supplements or ointments are not to be taken as medical advice.
Consult a healthcare professional prior to use if you are pregnant, nursing, taking medication, or have a medical condition.
Keep out of reach of children. Store in a cool, dry place. Do not use if seal under cap is broken or missing.
Order by 2PM to get delivered next working day! We use 24 hours service with carriers in most cases so that you can get your order delivered on time.
There is €4.99 charge for delivery under €50 Orders. Additional charges will be imposed by our couriers for delivery to remote area, a surcharge may be levied to cover carriage to these areas.
Please note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery.
| Variant | Quantity | Price | Total |
|---|---|---|---|
2000 IU + 100 µg
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4000 IU + 150 µg
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The United Vitamins team will work with you to design a wellness plan based on your health profile, your goals, and your lifestyle.