Vitamin D3 supports bone health and immune health, delivering a high potency daily source of cholecalciferol to help maintain calcium balance and resilient immunity. That’s pretty handy, to be honest, for busy daily routines. Klaire Labs sticks to strict quality standards, with hypoallergenic, allergen free ingredients and GMP compliant production.

Available Sizes & Variants:

100 capsules - convenient daily dose.

Benefits & Features:

• Supports bone health and calcium metabolism through a daily vitamin D3 intake.
• Strengthens immune defence to help you stay on top of seasonal challenges.
• Key active ingredient: vitamin D3 promotes calcium absorption for bone strength.
• Hypoallergenic and free from common allergens.
• Quality is central to Klaire Labs, with GMP compliant production, strict allergen controls, and meticulous testing that helps ensure you receive a dependable vitamin d supplement every time.

Klaire Labs has earned a reputation for pure, hypoallergenic supplements. That’s pretty handy, for busy daily routines. This Vitamin D3 formula uses lanolin derived cholecalciferol, packed into a vegetarian capsule and free from common allergens. Made in GMP certified facilities and subjected to allergen testing, it is built for sensitive systems who want a clean, reliable daily vitamin d3 supplement that fits routines. The brand's commitment to purity and careful quality control helps Klaire stand out, offering consistent potency you can trust.

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

• GTIN: 828054002036
• Manufacturer: Klaire Labs
• Categories: Back to School Supplements & EssentialsKlaire LabsNew ArrivalsPopular Supplement BrandsVitamin D
• 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 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.