Vitamin D3 plus K2 Cofactor Complex is a vitamin D supplement that helps support bone strength and healthy arteries, and immune health for a more resilient you.

Available Sizes & Variants:

60 capsules Vitamin D3 plus K2 Cofactor Complex - convenient daily dose.

Benefits & Features:

• Boosts bone health with balanced calcium support.
• Supports immune function and mood as part of a daily multivitamin plan.
• Directs calcium to bones and helps protect arteries from calcification.
• Intended for daily use as a vitamin d supplement and easy to fit into routines.
• Quality you can trust from a science led brand, with k2 vitamin synergy and professional grade ingredients manufactured in FDA registered facilities.

Neuro Biologix brings over 15 years of nutrigenomics expertise to this cofactors complex, with professional grade ingredients produced in FDA registered, cGMP facilities in the United States. Led by Dr Kendal Stewart, the brand focuses on science driven personalisation and quality, delivering strong potency and absorption according to customer feedback. Calcium support from Vitamin D3 with Vitamin K2's directing action helps bones and arteries work together for everyday vitality.

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 caps daily with food\, preferably in the morning with breakfast\, or as directed by a healthcare professional.

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

1. Supports Bone Health: Vitamin D3 and K2 work together to promote the absorption of calcium and maintain healthy bones, reducing the risk of osteoporosis and fractures.
2. Boosts Immune System: Vitamin D3 is known as the "sunshine vitamin" and is crucial for a strong immune system. The addition of K2 helps to activate certain immune cells, further enhancing immune function.

The Active Ingredient Is: Vitamin D3 (Cholecalciferol)

Vitamin D3 is a fat-soluble vitamin essential for normal skeletal health and immune function.

This product pairs Vitamin D3 with Vitamin K2 cofactors to optimise calcium utilisation and support healthy mineral balance in the body.

What Does Vitamin D3 Do?

Vitamin D3 helps regulate calcium absorption in the gut, supporting skeletal strength. It also supports immune function in line with UK and EU health recommendations.

In this formula, Vitamin K2 acts as a cofactor to direct calcium into bones and away from soft tissues, while Vitamin D3 enhances calcium availability; studies indicate that combining these nutrients may have added benefits for bone and vascular health.

Dr. Zhang of the University of Exeter found that combined supplementation may have a greater effect than either nutrient alone.

This combination supports calcium handling and mineralisation processes essential to healthy bones and a resilient vascular system.

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

Welzo chose Neuro Biologix as our partner for Vitamin D3 plus K2 Cofactor Complex because it embodies rigorous quality, scientific credibility, and a clear commitment to purity that aligns with our standards for core nutrients. Neuro Biologix is recognised for its professional-grade formulations and focus on nutrigenomics, under the guidance of Dr. Kendal Stewart, with over 15 years in the field. This heritage supports a dependable platform for the D3 and K2 cofactor complex and a philosophy of targeting personalised nutrient delivery.

The manufacturer runs in FDA‑registered, cGMP‑compliant facilities and upholds strict raw material control with thorough testing for purity and potency. Their focus on free-from artificial ingredients and allergens highlights a quality-first approach that fits with Welzo’s safety and transparency ethos. This brand was assessed by Welzo's healthcare professionals for compliance with our rigorous testing protocols, reinforcing our trust in their manufacturing standards.

For product fit, Neuro Biologix’s specialised focus on purity and efficacy makes this brand especially well suited for a Vitamin D3 plus K2 Cofactor Complex, delivering a trustworthy pairing of nutrients that supports bone and cardiovascular health as described in the research into the product.