3-K Complete™ (Vitamin K) brings together vitamin K1 with MK-4 and MK-7 to support bone health and arterial wellness by steering calcium into the places it’s needed most. Thorne's commitment to quality shines through in every vegetarian capsule. With thorough quality checks and a reputation for research-led formulations, this brand helps you feel confident about what you’re taking.

Available Sizes & Variants:

60 Veg Caps — convenient daily dosing for vegans and vegetarians

Benefits & Features:

• Supports bone strength with K1 and K2.
• Helps steer calcium away from arteries and into bone tissue for arterial health.
• Contains MK-4 and MK-7 for broader vitamin K2 action.
• Vegetarian capsules suit vegan and veggie lifestyles.
• Quality controls and a science-driven approach support reliable daily use across your routine, giving you confidence you’re covered from morning to night and through busy days.

Thorne's heritage as a science focused wellness brand shines through this complete Vitamin K formula. The mix pairs vitamin K1 with MK-4 and MK-7 in vegetarian capsules, making it suitable for vegans and vegetarians. Thorne is known for rigorous quality controls and research informed product development, so you can trust the dosing and formulation. Many customers pair this with a vitamin d supplement, and some opt for a k2 vitamin with d3 alongside herbal supplements for a broader daily wellness routine.

Hypromellose Capsule, Microcrystalline Cellulose, Mixed Tocopherols, Silicon Dioxide

• GTIN: 693749006619
• Manufacturer: Thorne
• Categories: New ArrivalsPopular Supplement BrandsThorne SupplementsVitamin K Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take 1 or 2 capsules daily between meals, or as advised by a healthcare professional. 1 capsule 1 to 4 times daily

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: Vitamin K (K1 and K2 MK-4/MK-7)

Vitamin K is a nutrient essential for normal bodily functions, here shown as a mix of Vitamin K1 and two forms of Vitamin K2. This blend supports the body’s natural nutrient balance involved in calcium utilisation. This formulation includes K1 along with MK-4 and MK-7 forms to provide multiple sources of vitamin K activity.

Vitamin K plays a role in activating proteins important for bone mineralisation and arterial health, with K2 forms directing calcium to bones and away from arteries. The combination aims to support these normal processes in a vegetarian capsule format.

What Does Vitamin K Do?

Vitamin K participates in normal blood clotting processes and supports bone health through its role in activating specific proteins. EFSA-recognised functions include contributions to bone mineralisation and maintaining arterial elasticity as part of healthy calcium management.

In this formulation, the presence of both K1 and K2 forms supports the body's ability to utilise calcium in bones while contributing to vascular and skeletal normal function.

This supplement is not intended to diagnose, treat, cure, or prevent any disease.

Welzo picks brand partnerships with a clear focus on reliability and robust quality processes, backed by science. Thorne Research Inc. stands out as a well-regarded name in the supplement landscape, recognised for top-quality, research-backed products and a commitment to clinically relevant formulations. Our collaboration with Thorne is built on their well-established reputation for quality manufacturing and rigorous, research-led product development, underpinned by GMP-compliant practices. This brand was evaluated by our medical team for alignment with our ingredient quality and purity standards, ensuring ongoing trust in every ingredient we offer.

Thorne’s ingredient selection philosophy emphasises rigorous quality controls and science-led formulation, which we recognise as essential for building consumer confidence. For the product 3-K Complete (Vitamin K), Thorne combines K1 with MK-4 and MK-7 in carefully considered dosages to support calcium distribution in the body, aligning with our commitment to evidence-informed supplement choices.

Choosing Thorne over competitors reflects our criteria for proven manufacturing excellence, ongoing third-party verification where available, and a heritage built on dependable, research-informed health solutions. This brand’s approach translates into reliable quality and a positive customer experience with Thorne products.