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Vitamins

Bio-D-Mulsion Forte®

£25.17 for 365 servings at Healf. That works out at 2p per 1,000 IU, which ranks it 21st of the 207 vitamin D3 products we price across 20 UK retailers.

What it really costs, per 1,000 IU2pOne 1,000 IU dose is our comparison unit for vitamin D3. It is not a recommendation.

A day2p

A week12p

A month52p

A year£6.29

At one 1,000 IU dose a day, this pack lasts 4 years. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

In the pack: 365 × 4,000 IU = 1,460,000 IU
£25.17 ÷ 1,460,000 IU × 1,000 IU = 1.72p per 1,000 IU
A week 1.72p × 7 = 12p · a month × 30 = 52p · a year × 365 = £6.29
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 →

Nature's AnswerVitamin D3 DropsHealf · 4,000 IU a serving · 40p a month · a pack lasts 2.7 years1p£13.49View at Healf

Vitamin D3 + K2 180 Brand NewProtein Works · 4,000 IU a serving · 42p a month · a pack lasts 2 years1p£9.99View at Protein Works

ZipVitVitamin D3 4000iu SoftgelsZipVit · 4,000 IU a serving · 42p a month · a pack lasts 2 years1p£9.99View at ZipVit

Vitamin D-3 5,000 IUHealf · 5,000 IU a serving · 42p a month · a pack lasts 1.6 years1p£8.49View at Healf

Vitamin D3 TabletsBulk · 4,000 IU a serving · 50p a month · a pack lasts 12 months2p£5.99View at Bulk

This productHealf · 4,000 IU a serving · 52p a month · a pack lasts 4 years2pshown above

Switching to the Healf pack saves 11p 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: 365 servings · 0.08 ml a serving
Cost per serving: 7p (365 servings in the pack)

More label details

Sold by: Healf
What the listing says: “Servings Per Container: 365” · “2 Drops (0.08mL)” · “100 mcg (4,000 IU) per two-drop serving”

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Daily doseIUFordays

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: £25.17Healf
First recorded: £25.171 Oct
Checked on: 20 dayssince 1 Oct

Pack price at each check.

1 OctFirst checked at Healf: £25.17

Questions about this product

How much does Biotics Research Bio-D-Mulsion Forte® cost per 1,000 IU?

2p per 1,000 IU, from £25.17 for 365 servings at Healf, checked on 20 October 2026.

Is it the cheapest vitamin D3 in the UK?

No, it is 21st of 207. High-Strength Vitamin D3 Tablets at WeightWorld works out at 1p per 1,000 IU.

How long does one pack last?

4 years at one 1,000 IU dose. The pack holds 1,460,000 IU in total.

About Biotics Research

All 7 Biotics Research products, priced per dose

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