Vitamin D3 4000IU, 425 softgels
£19.99 for 425 softgels at VitaBright. That works out at 1p per 1,000 IU, which ranks it 10th of the 207 vitamin D3 products we price across 20 UK retailers.
At one 1,000 IU dose a day, this pack lasts 4.7 years. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 425 ÷ 1 per serving = 425
- In the pack: 425 × 4,000 IU = 1,700,000 IU
- £19.99 ÷ 1,700,000 IU × 1,000 IU = 1.18p per 1,000 IU
- A week 1.18p × 7 = 8p · a month × 30 = 35p · a year × 365 = £4.29
- Amount per serving: stated on the label.
The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.
Cheaper vitamin D3
All 207, ranked →
Switching to the ZipVit pack saves 7p a month at the same 1,000 IU dose.
Ranked purely by price per 1,000 IU. 439 combination products also contain vitamin D3.
On the label
- Vitamin D3 · Vitamin D3
- 4,000 IU per serving (stated on the label)
- Pack
- 425 softgels · 425 servings · 1 softgel(s) a serving
- Cost per serving
- 5p (425 servings in the pack)
More label details
- Sold by
- VitaBright
- What the listing says
- “425 High Strength Softgels” · “Servings Per Container: 425” · “Serving Size: 1 Softgel” · “Vitamin D3 Cholecalciferol ; 4000 IU”
Ingredients
Vitamin D3 From animal sources. Clean with no artificial additives.
From the VitaBright listing. Check the pack itself if you have an allergy: labels mark allergens in bold.
Add to your basket
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One 1,000 IU dose is our comparison unit, not a recommendation.
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Filled in from the label’s serving: 1 softgel.
What you paid
Optional. At VitaBright today: £19.99.
“Order by” allows 3 working days’ delivery from VitaBright and your spare days.
Price history
No price change since 9 October 2026. Checked on 1 day, most recently 9 October 2026.
- Price at every check
- £19.99VitaBright
- First recorded
- £19.999 Oct
- Checked on
- 1 daysince 9 Oct
Checked once so far, on 9 October 2026.
- First checked at VitaBright: £19.99
Questions about this product
How much does VitaBright Vitamin D3 4000IU cost per 1,000 IU?
1p per 1,000 IU, from £19.99 for 425 softgels at VitaBright, checked on 9 October 2026.
Is it the cheapest vitamin D3 in the UK?
No, it is 10th of 207. High-Strength Vitamin D3 Tablets at WeightWorld works out at 1p per 1,000 IU.
How long does one pack last?
4.7 years at one 1,000 IU dose. The pack holds 1,700,000 IU in total.
About VitaBright
All 140 VitaBright products, priced per dose
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