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Double Wood SupplementsVitamins

Vitamin D3 + K2 Liquid Drops

£20.99 for 30 servings at Healf. That works out at 14p per 1,000 IU, which ranks it 128th 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 week98p
A month£4.20
A year£51.08

At one 1,000 IU dose a day, this pack lasts 5 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Vitamin D3

  • In the pack: 30 × 5,000 IU = 150,000 IU
  • £20.99 ÷ 150,000 IU × 1,000 IU = 14p per 1,000 IU
  • A week 14p × 7 = 98p · a month × 30 = £4.20 · a year × 365 = £51.08
  • Amount per serving: stated on the label.

Vitamin K2

  • In the pack: 30 × 200 µg = 6 mg
  • £20.99 ÷ 6 mg × 100 µg = 35p per 100 µg
  • A week 35p × 7 = £2.45 · a month × 30 = £10.49 · a year × 365 = £127.69
  • 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 →
Meteron LabsLiposomal Vitamin D3/K2W-Wellness · 4,000 IU a serving · £3.75 a month · a pack lasts 8 months12p£29.99View at W-Wellness (opens in a new tab)
Zita WestVitamin DHealf · 1,000 IU a serving · £3.90 a month · a pack lasts 3 months13p£13.00View at Healf (opens in a new tab)
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)
This productHealf · 5,000 IU a serving · £4.20 a month · a pack lasts 5 months14pshown above

Switching to the W-Wellness pack saves 45p a month at the same 1,000 IU dose.

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

Cheaper vitamin K2 MK-7

All 68, ranked →
K2 DropsHealf · 30 µg a serving · £9.16 a month · a pack lasts 3 months31p£27.49View at Healf (opens in a new tab)
Vitamin K2 75µgHealthspan · 75 µg a serving · £9.33 a month · a pack lasts 45 days31p£13.99View at Healthspan (opens in a new tab)
Vitamin D3 & K2Healf · 100 µg a serving · £9.60 a month · a pack lasts 2 months32p£19.19View at Healf (opens in a new tab)
4000IU Vitamin D3 + K2Healf · 100 µg a serving · £9.99 a month · a pack lasts 2 months33p£19.99View at Healf (opens in a new tab)
Vitamin D3 + K2 (Formerly K2-7+D3)Healf · 150 µg a serving · £10.00 a month · a pack lasts 3 months33p£29.99View at Healf (opens in a new tab)
This productHealf · 200 µg a serving · £10.49 a month · a pack lasts 2 months35pshown above

Switching to the Healf pack saves £1.33 a month at the same 100 µg dose.

Ranked purely by price per 100 µg. 52 combination products also contain vitamin K2.

On the label

Vitamin D3 · Vitamin D3
5,000 IU per serving (stated on the label)
Vitamin K2 · MK-7
200 µg per serving (stated on the label)
Pack
30 servings · 1 ml a serving
Cost per serving
70p (30 servings in the pack)
More label details
Sold by
Healf
What the listing says
“Servings Per Container: 30” · “Serving Size: 1 mL” · “Vitamin D3 (as Cholecalciferol) ; 125 mcg”
Ingredients

Vitamin K2 (K2VITAL® All-Trans Menaquinone-7), Vitamin D3 (as Cholecalciferol), Medium Chain Triglyceride (MCT) Oil

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

1 price change since 1 October 2026. Checked on 20 days, most recently 20 October 2026.

Lowest recorded
£17.361 Oct
Highest recorded
£20.9920 Oct
First recorded
£17.361 Oct
Checked on
20 dayssince 1 Oct
Pack price at each check.
  1. Up at Healf: £17.36 → £20.99 (+21%)
  2. First checked at Healf: £17.36

Questions about this product

How much does Double Wood Supplements Vitamin D3 + K2 Liquid Drops cost per 1,000 IU?

14p per 1,000 IU, from £20.99 for 30 servings at Healf, checked on 20 October 2026.

Is it the cheapest vitamin D3 in the UK?

No, it is 128th of 207. High-Strength Vitamin D3 Tablets at WeightWorld works out at 1p per 1,000 IU.

How long does one pack last?

5 months at one 1,000 IU dose. The pack holds 150,000 IU in total.

How much does Double Wood Supplements Vitamin D3 + K2 Liquid Drops cost per 100 µg?

35p per 100 µg, from £20.99 for 30 servings at Healf, checked on 20 October 2026.

Is it the cheapest vitamin K2 MK-7 in the UK?

No, it is 45th of 68. Vitamin D3 2000IU + K2 (MK-7) Tablets at WeightWorld works out at 2p per 100 µg.

How long does one pack last?

2 months at one 100 µg dose. The pack holds 6 mg in total.

About Double Wood Supplements

All 22 Double Wood Supplements products, priced per dose

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