Vitamin D3 is a high potency vitamin D3 supplement designed to rapidly correct significant deficiency under medical supervision for adults who need quick repletion. Each vegan capsule contains 10,000 IU of vitamin d3 for potent repletion. Thorne also safeguards by manufacturing in FDA registered, GMP certified facilities and by keeping excipients hypoallergenic and fully disclosed. Quality you can trust, every capsule is vetted.

Available Sizes & Variants:

60 Veg Caps - High potency vitamin D3 supplement for rapid repletion under medical supervision.

Benefits & Features:

• Rapid repletion supports quicker restoration of vitamin d levels.
• Each capsule delivers 10,000 IU of vitamin d3 for potent repletion.
• Vegan capsule and hypoallergenic excipients make daily use easy.
• Manufactured in FDA registered, GMP certified facilities for safety and quality.
• Thorne's commitment to purity and transparency shines through; full excipient disclosure and no premixed dilutions mean you can trust exactly what goes into each capsule, making daily use straightforward.

Thorne has built a reputation for clinical grade purity and transparent sourcing. D-10,000 formula is produced in FDA registered facilities with GMP compliance, and it carries NSF Certified for Sport status, ensuring batch testing for purity. The vegan capsule uses hypoallergenic excipients and avoids premixed dilutions, reflecting Thorne's commitment to safety and reliability in everyday wellbeing. Clinicians and athletes alike value Thorne for its long standing focus on rigorous quality and consistent potency, and many customers pair vitamin d3 and k2 for balance.

Vitamin D

• GTIN: 693749148012
• Manufacturer: Thorne
• Categories: Back to School Supplements & EssentialsNew ArrivalsPopular Supplement BrandsThorne SupplementsVitamin 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 or as advised by your healthcare professional. Take 2 capsules twice daily.

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

The Active Ingredient Is: Vitamin D3 (Cholecalciferol)

Vitamin D3, or simply cholecalciferol, is a fat-soluble nutrient essential for everyday bodily function in adults.

This form is sourced as a potent cholecalciferol used to support vitamin D status and is commonly supplied in pure, hypoallergenic formulations crafted for content clarity.

What Does Vitamin D3 Do?

Vitamin D3 helps regulate calcium uptake and supports bone health, with roles in immune system function in line with NHS and EFSA guidance.

Dr. Michael Holick from Boston University found that vitamin D3 influences calcium utilisation and immune system activity, aligning with recognised nutrient functions for bone and immune health.

This note ensures information stays within endorsed physiological roles and regulatory guidance.

Welzo’s collaboration criteria centre on a brand’s heritage, production excellence and a clear commitment to quality. Thorne’s longstanding reputation in the sector, including FDA-registered, GMP-certified facilities and third‑party audits, fits neatly with our standards for reliable sourcing. The brand is recognised for clinical-grade purity and proactive openness, emphasising that their vitamin D3 products are free from premixed dilutions and hidden fillers, with fully disclosed excipients. This commitment to safety and purity is a key part of why we decided on Thorne as our supplier for this supplement.

We assessed Thorne against our strict criteria and were impressed by their focused quality framework, including NSF Certified for Sport® status that supports batch testing for purity and absence of contaminants. This emphasis on thorough testing and safety backs our confidence in Thorne. For us, this translates into a dependable partner that fits with our in-house assessment process, which you can check out via our team of medical experts and our quality certification process.

Product-specific, Thorne’s D‑10,000 vitamin D3 aligns with our goals for strong repletion options while staying hypoallergenic and pure. This makes Thorne a natural fit for Vitamin D3, supporting Welzo’s commitment to evidence-based, safe supplementation.