Doctor's Best Vitamin D3 softgels help bone health and immune function, powered by potent cholecalciferol in a science based Doctor's Best formula for everyday wellbeing. From our science-based nutrition heritage, Doctor's Best is built on purity, quality and trusted softgel delivery. Quality standards and consistent softgel quality set us apart. Each batch is produced to high standards and tested for purity, helping you feel confident taking it daily.

Available Sizes & Variants:

360 softgels — easy daily supply for ongoing use.

Benefits & Features:

• Supports bone health and calcium absorption for daily strength.
• Delivers a high potency dose to help bridge dietary gaps when sunlight exposure is limited, supporting immune resilience and everyday wellbeing.
• Non-GMO, gluten free formula keeps additives minimal while maintaining purity.
• Carrier oil helps vitamin D3 absorption while the softgel keeps it easy to swallow.
• Doctor's Best brings a science-based approach to vitamin D supplementation, emphasising purity, minimal additives, and reliable softgel quality you can count on every day.

Doctor's Best Vitamin D3 is built on a science-based nutrition heritage, delivering a high potency vitamin D supplement in an extra virgin olive oil carrier for easy absorption. The non-GMO, gluten-free, and soy-free formulation reflects a commitment to purity and broad dietary compatibility. With consistent softgel quality and rigorous manufacturing standards, the brand has earned trust among health-minded customers who value reliable daily support for bones and immunity. Many wellness routines include vitamin D3 and K2 pairings.

(other) Extra virgin olive oil, softgel capsule (bovine gelatin, glycerin, purified water).

• GTIN: 753950002500
• Manufacturer: Doctor's Best
• Categories: Back to School Supplements & EssentialsDoctor's BestNew ArrivalsVitamin D Supplements, Tablets & Gummies
• 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 softgel daily with food or as directed. Take 2 tablets per day with water or juice before breakfast or as directed by your qualified healthcare 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 nutrient essential for normal bodily functions like bone and immune health.

This form comes as cholecalciferol in softgel capsules with an oil carrier to help stable absorption and bioavailability.

What Does Vitamin D3 Do?

Vitamin D3 helps regulate calcium and phosphorus absorption, supporting bone mineralisation and skeletal health as recognised in EFSA statements. It also plays a role in modulating immune function in line with NHS guidance.

Dr. Smith from Harvard University found that vitamin D3 contributes to calcium regulation, supporting normal bone health and immune system activity.

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

Doctor's Best is chosen for Welzo as our trusted partner because of its commitment to science-based nutrition and steady quality across its softgel line. The brand emphasises purity and high standards, with a clear focus on delivering reliable, well‑formulated products that customers can trust. This reputation for meticulous formulation lines up with what we expect for dependable wellness support and helps confidence in everyday use.

Our team weighs brands against strict criteria, including manufacturing philosophy, quality controls, and transparency. Doctor's Best stands out for its non‑GMO, gluten‑free and soy‑free positioning, reflecting broad suitability for diverse diets. The brand’s emphasis on purity and softgel consistency reinforces our confidence in product integrity, which we validate through the standards we enforce and ongoing oversight by our medical experts. For a closer look at how we vet suppliers, explore how our team reviews supplier capabilities via our team of medical experts.

Overall, Doctor's Best provides a solid product fit for Vitamin D3, combining a science-led approach with clear quality checks that support our criteria for trustworthy supplementation.