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ThorneVitamins

Vitamin D-1,000, 180 capsules

£25.99 for 180 capsules at Healf. That works out at 14p per 1,000 IU, which ranks it 130th of the 207 vitamin D3 products we price across 20 UK retailers.

What it really costs, per 1,000 IU14pOne 1,000 IU dose is our comparison unit for vitamin D3. It is not a recommendation.
A day14p
A week£1.01
A month£4.33
A year£52.70

At one 1,000 IU dose a day, this pack lasts 6 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 × 1,000 IU = 180,000 IU
  • £25.99 ÷ 180,000 IU × 1,000 IU = 14.4p per 1,000 IU
  • A week 14.4p × 7 = £1.01 · a month × 30 = £4.33 · a year × 365 = £52.70
  • 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 →
Higher NatureVitamin D3Higher Nature · 500 IU a serving · £3.98 a month · a pack lasts 2 months13p£7.95View at Higher Nature (opens in a new tab)
Natures AidVegan Vitamin D3 1000iu (25ug) 60 TabletsLloyds Pharmacy · 1,000 IU a serving · £4.02 a month · a pack lasts 2 months13p£8.04View at Lloyds Pharmacy (opens in a new tab)
Vitamin D3 1000 IU & K2 100 mcgHealf · 1,000 IU a serving · £4.09 a month · a pack lasts 3 months14p£12.26View at Healf (opens in a new tab)
Vitamin D3 + K2 Liquid DropsHealf · 5,000 IU a serving · £4.20 a month · a pack lasts 5 months14p£20.99View at Healf (opens in a new tab)
Liposomal D3K2Healf · 2,500 IU a serving · £4.20 a month · a pack lasts 5 months14p£20.99View at Healf (opens in a new tab)
This productHealf · 1,000 IU a serving · £4.33 a month · a pack lasts 6 months14pshown above

Switching to the Higher Nature pack saves 36p a month at the same 1,000 IU dose.

Ranked purely by price per 1,000 IU. 439 combination products also contain vitamin D3.

Pack sizes

PackPricePer doseA year
180 capsulesthis pack£25.9914p£52.70
90 capsules£13.0214p£52.80

This pack is the cheapest of the 2 sizes per dose.

On the label

Vitamin D3 · Vitamin D3
1,000 IU per serving (stated on the label)
Pack
180 capsules · 180 servings · 1 capsule(s) a serving
Cost per serving
14p (180 servings in the pack)
More label details
Sold by
Healf
What the listing says
“180caps” · “Serving Size: 1 Capsule” · “(1,000 IU) ; 25 mcg”
Ingredients

L-Leucine, Vitamin D (as Vitamin D3) (1,000 IU), Bulking Agent (Microcrystalline Cellulose), Hypromellose (Derived from Cellulose) Capsule, Anti-Caking Agent (Silicon Dioxide), Antioxidant (Vitamin E (D-Alpha Tocopheryl))

From the Healf listing. Check the pack itself if you have an allergy: labels mark allergens in bold.

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One 1,000 IU dose is our comparison unit, not a recommendation.

Price history

No price change since 1 October 2026. Checked on 20 days, most recently 20 October 2026.

Price at every check
£25.99Healf
First recorded
£25.991 Oct
Checked on
20 dayssince 1 Oct
Pack price at each check.
  1. First checked at Healf: £25.99

Questions about this product

How much does Thorne Vitamin D-1,000 cost per 1,000 IU?

14p per 1,000 IU, from £25.99 for 180 capsules at Healf, checked on 20 October 2026.

Is it the cheapest vitamin D3 in the UK?

No, it is 130th of 207. High-Strength Vitamin D3 Tablets at WeightWorld works out at 1p per 1,000 IU.

How long does one pack last?

6 months at one 1,000 IU dose. The pack holds 180,000 IU in total.

About Thorne

All 123 Thorne products, priced per dose

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All vitamin D3Every form, cheapest per 1,000 IU firstVitamin D3 guideWhat it is, why people take it, how the forms differThorneAll 123 products from this brand, per doseVitaminsEverything else we price in this categoryVitamin D3 price historyEvery vitamin D3 product's price per dose and price historyBuild a basketThe cheapest way to buy several at onceHow we compareWhere every number on this page comes from