Vitamin D3 400iu, 180 tablets
£6.50 for 180 tablets at Lamberts Healthcare (Nature's Best). That works out at 9p per 1,000 IU, which ranks it 105th of the 207 vitamin D3 products we price across 20 UK retailers.
At one 1,000 IU dose a day, this pack lasts 2 months. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 180 ÷ 1 per serving = 180
- In the pack: 180 × 400 IU = 72,000 IU
- £6.50 ÷ 72,000 IU × 1,000 IU = 9.03p per 1,000 IU
- A week 9.03p × 7 = 63p · a month × 30 = £2.71 · a year × 365 = £32.95
- 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 Healf pack saves 21p 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
- 400 IU per serving (stated on the label)
- Pack
- 180 tablets · 180 servings · 1 tablet(s) a serving
- Cost per serving
- 4p (180 servings in the pack)
More label details
- Claimed on the listing
- vegan, vegetarian
- Barcode
- 5055148403935
- Sold by
- Lamberts Healthcare (Nature's Best)
- What the listing says
- “Specifications: 180 Tablets” · “one-a-day Vitamin D3 400iu tablets” · “Vitamin D3 400iu”
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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 tablet.
What you paid
Optional. At Lamberts Healthcare today: £6.50.
“Order by” allows 4 working days’ delivery from Lamberts Healthcare and your spare days.
Price history
No price change since 21 September 2026. Checked on 27 days, most recently 20 October 2026.
- Price at every check
- £6.50Lamberts Healthcare (Nature's Best)
- First recorded
- £6.5021 Sept
- Checked on
- 27 dayssince 21 Sept
- First checked at Lamberts Healthcare (Nature's Best): £6.50
Questions about this product
How much does Nature's Best Vitamin D3 400iu cost per 1,000 IU?
9p per 1,000 IU, from £6.50 for 180 tablets at Lamberts Healthcare (Nature's Best), checked on 20 October 2026.
Is it the cheapest vitamin D3 in the UK?
No, it is 105th of 207. High-Strength Vitamin D3 Tablets at WeightWorld works out at 1p per 1,000 IU.
How long does one pack last?
2 months at one 1,000 IU dose. The pack holds 72,000 IU in total.
About Nature's Best
Founded 1981 · Tunbridge Wells, England · Part of Procter & Gamble
Nature's Best is a vitamins and supplements brand based in Tunbridge Wells, Kent, that has sold direct to the public since 1981. It is a trading name of Lamberts Healthcare Ltd, which also supplies practitioners and pharmacists under the Lamberts name.
All 136 Nature's Best products, priced per doseVisit Nature's Best (opens in a new tab)
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