Swanson Vitamin D3 is a strong potency vitamin D supplement that supports bone health, immune function, calcium metabolism, and overall wellbeing. The main active ingredient is vitamin D3, crucial for supporting bone health and immune function. Swanson's plain, single-ingredient formula keeps things simple and dependable.

Available Sizes & Variants:

250 softgels – Great value for daily use

Benefits & Features:

• Only ingredient maintains the formulation tidy.
• Supports immune function by helping regulate pathways that defend against daily stressors, while the easy daily routine keeps your wellness habit simple and reliable every day
• High potency helps simplify daily intake for busy lifestyles, cutting the hassle of hitting nutrient goals
• Single ingredient, no unnecessary extras, keeping the formula straightforward and easy to trust
• Designed for daily use in a softgel format, it slots into morning routines and helps you keep a steady vitamin D intake for ongoing bone and immune support

Swanson Vitamin D3 Highest Potency is built around a clean, single ingredient approach, making it easy to manage daily intake. The 5,000 IU dose is designed for those who want robust vitamin D support without extra fillers, and the softgel format makes it simple to swallow with meals. The brand's long standing focus on straightforward supplements helps create a reliable staple in many wellbeing routines.

Other Ingredients - Flaxseed oil, Gelatin, Glycerin, Purified water.

• GTIN: 87614113715
• Manufacturer: Swanson
• Categories: Best SellersNew ArrivalsSubscribe & Save ProductsSwansonVitamin 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 and water as a dietary supplement.

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

The Active Ingredient Is: Vitamin D3 (Cholecalciferol)

Vitamin D3, also known as cholecalciferol, is a fat-soluble nutrient essential for bone and immune function.

This form is the standard supplement ingredient and is presented in a highly bioavailable format.

What Does Vitamin D3 Do?

Vitamin D3 participates in calcium absorption and supports bone health, with immune function support noted by health authorities.

Scientific evidence suggests that vitamin D3 can reduce influenza-like illness in healthcare settings, illustrating its potential role in supporting immune resilience.

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

Dietary supplements are not a replacement for a balanced diet. Do not take more than the recommended amount. Keep in a cool, dry area away from light and heat. Ensure they are out of children's reach and view.

Welzo selected Swanson for Vitamin D3 Highest Potency 5,000 IU because Swanson stands out as a trusted specialist in high‑potency, single‑ingredient supplements. This brand has a longstanding reputation for delivering straightforward, effective formulations that emphasise potency and purity, aligning with our commitment to quality and transparency. The product uses Vitamin D3 (cholecalciferol) at 5,000 IU per softgel, a clearly labelled dose designed for those seeking robust vitamin D support, and this clear, single‑ingredient approach mirrors our preference for reliability and simplicity.

Swanson’s manufacturing approach, combined with rigorous sourcing and quality practices, supports consistent potency and accuracy in every batch. Our expert team of doctors, nurses, and nutritionists assess these attributes as part of our standard evaluation, ensuring alignment with our expert team of doctors, nurses, and nutritionists. This brand also meets our our ingredient quality and purity standards, giving you confidence in both product and supplier.

In this board‑room to bedside fit, Swanson provides a reliable, well‑supported option that complements our broader vitamin D strategy and demonstrates why it was chosen for this supplement.