Vitamin D3 1000IU, 100 Capsules - Klaire Labs

(other) Microcrystalline cellulose, vegetarian capsule (hydroxypropyl methylcellulose, water), L-leucine, and silicon dioxide.

United Kingdom & Rest of the World Shipping Details:
Same day dispatch for orders placed by 2pm (Orders after 2pm dispatched 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 14 days in the same original and unopened packaging. Subject to T&C's.

Welzo is a UK-based health platform. Orders ship from the UK.

Take one capsule daily with food or follow your healthcare professional's instructions. Take 1-2 capsules two times daily or as recommended by your health professional.

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

The Active Ingredient Is: Vitamin D3 (Cholecalciferol)

(Vitamin D3, or cholecalciferol, is a fat-soluble vitamin that helps support normal skeletal and cellular health.)

(This form is sourced from lanolin and is suitable for vegetarians, emphasising its natural origin and bioavailability for the body.)

What Does Vitamin D3 Do?

(Vitamin D3 helps manage calcium metabolism and supports bone mineralisation, while also contributing to immune function in line with EFSA and NHS guidance.)

(Dr. LeBoff of Harvard University found that Vitamin D3 supplementation can improve serum levels of vitamin D and contribute to immune support in suitable populations.)

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

Klaire Labs is chosen for Welzo because the brand consistently shows a solid commitment to quality from formulation through to finished product. Klaire Labs is known for producing hypoallergenic, allergen-free and non-GMO supplements, with facilities that operate under strict GMP standards to prioritise purity, identity and potency. This reputation for meticulous manufacturing aligns with Welzo’s emphasis on safety and reliability, a standard our expert team continuously evaluates when selecting partners. This supports our vetting, Klaire Labs’ operations are guided by a disciplined quality mindset, and the brand prioritises testing for allergen and contaminant control as part of its core process.

Our evaluation process combines manufacturer credentials with Welzo’s internal criteria, including manufacturing philosophy, traceable supply chains and commitment to purity. This product benefits from Klaire Labs’ solid foundation in quality science and allergen-conscious formulation, making Klaire Labs a strong fit for a vitamin D3 supplement designed for clarity and safety. For more on our team’s approach and our quality standards, see our expert team of doctors, nurses, and nutritionists and our ingredient quality and purity standards.