Vitamin D+K2 is a supplement that supports bone and vascular health by pairing vitamin D3 and vitamin K2, backed by Thorne's strict quality checks and independent testing. The D3 component helps you absorb calcium from food and supplements, supporting healthy bones and immune function. The K2 MK-4 directs calcium to bones and keeps it out of arteries, helping vascular health. Thorne's cGMP facilities and NSF certification provide confidence in purity and potency.

Available Sizes & Variants:

1oz liquid supplement - convenient daily dose.

Benefits & Features:

• Supports bone strength naturally.
• As a vitamin d supplement, Vitamin D3 boosts calcium absorption to help maintain healthy bones and immune support, making daily wellness simpler and more effective for busy days and restful nights alike.
• K2 vitamin MK-4 directs calcium to bones and keeps it out of arteries, supporting vascular health.
• Dropper dosing offers precise, easy to adjust amounts you can trust for personalised daily use.
• Manufactured in cGMP facilities with NSF certification for purity and potency you can rely on every day.

Thorne's Vitamin D+K2 is crafted in cGMP-compliant facilities and NSF certified, underscoring our commitment to purity and potency. The blend pairs vitamin D3 with K2 in the MK-4 form, delivering the star ingredients that help calcium move where it's needed. D3 boosts calcium absorption, supporting bone mineralisation, while K2 vitamin MK-4 directs calcium to bones and keeps it out of arteries, aiding vascular health. The convenient dropper and fat-based base make daily dosing simple and reliable. It's a trusted vitamin d supplement for daily wellness.

Vitamin D, Vitamin K

• GTIN: 693749500018
• Manufacturer: Thorne
• Categories: Back to School Supplements & EssentialsNew ArrivalsPopular Supplement BrandsThorne 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 2 drops once to three times daily, or as directed by your healthcare provider. Turn the bottle upside down to dispense each drop. You can add it to food or mix it into drinks. Do not refrigerate. Take 2-3 capsules\, 2-3 times a day or as directed by your practitioner

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

The Active Ingredient Is: Vitamin D3 (Cholecalciferol)

Vitamin D3, also known as cholecalciferol, is a fat-soluble vitamin essential for bone and immune health.

This form is the standard dietary form of vitamin D3, which supports normal physiological processes related to calcium handling and skeletal function.

What Does Vitamin D3 Do?

Vitamin D3 helps regulate calcium absorption, supporting bone mineralisation and immune function in line with NHS and EFSA guidance.

In this product, Vitamin D3 is paired with Vitamin K2 to help direct calcium to the bones and maintain vascular health as part of a balanced nutrient approach.

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

Thorne Research is our preferred maker for Vitamin D+K2 because of its long-running commitment to quality, openness, and scientific rigour. This brand operates in facilities that follow Current Good Manufacturing Practices (cGMP) and maintains rigorous quality control and purity testing protocols, earning trust among healthcare practitioners. Thorne is NSF Certified, with clear allergen controls and transparent labeling, which underscores its reliability and consumer safety standards. This combination of certifications and rigorous testing sits at the core of why we partner with Thorne Research as a supplier.

In the UK market, Thorne’s approach aligns with Welzo’s expectations for rigorous quality and traceable sourcing. The brand’s emphasis on third-party testing and regulatory compliance translates into consistent, accurately labelled products that support our patients’ confidence in daily supplementation. Our clinicians and team evaluate Thorne for consistency, safety, and potency, reaffirming our partnership through Welzo's healthcare professionals and our quality certification process.

Product-wise, Thorne Research Vitamin D+K2 is well suited for this supplement category, delivering vitamin D3 and vitamin K2 in a formulation that supports the product's stated aims of bone strength, cardiovascular health, and immune function, while reflecting the brand’s dedication to meticulous quality standards.