Forte D 4000IU, 60 tablets
£16.21 for 60 tablets at Vitamin Planet. That works out at 7p per 1,000 IU, which ranks it 84th of the 207 vitamin D3 products we price across 20 UK retailers.
At one 1,000 IU dose a day, this pack lasts 8 months. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 60 ÷ 1 per serving = 60
- In the pack: 60 × 4,000 IU = 240,000 IU
- £16.21 ÷ 240,000 IU × 1,000 IU = 6.75p per 1,000 IU
- A week 6.75p × 7 = 47p · a month × 30 = £2.03 · a year × 365 = £24.65
- 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 16p 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
- 60 tablets · 60 servings · 1 tablet(s) a serving
- Cost per serving
- 27p (60 servings in the pack)
More label details
- Sold by
- Vitamin Planet
- What the listing says
- “60 Tablets” · “One tablet daily” · “Forte D 4000IU”
Ingredients
Xylitol, microcrystalline cellulose, vitamin D3 (with Arabic gum, antioxidant: d-?-tocopherol (from soya) tri-calcium phosphate), silicified microcrystalline cellulose, blackcurrant flavour, citric acid anhydrous, magnesium stearate, anti-caking agent: silicon dioxide.
From the Vitamin Planet listing. Check the pack itself if you have an allergy: labels mark allergens in bold.
Add to your basket
View basketYour basket prices everything you take together: whole packs, delivery included, from as few websites as you like.
One 1,000 IU dose is our comparison unit, not a recommendation.
Add to my stack
My stackSee when it runs out, the day to reorder by and what it costs you a day. Free, kept on this device.
Filled in from the label’s serving: 1 tablet.
What you paid
Optional. At Vitamin Planet today: £16.21.
“Order by” allows 3 working days’ delivery from Vitamin Planet and your spare days.
Price history
No price change since 7 October 2026. Checked on 1 day, most recently 7 October 2026.
- Price at every check
- £16.21Vitamin Planet
- First recorded
- £16.217 Oct
- Checked on
- 1 daysince 7 Oct
Checked once so far, on 7 October 2026.
- First checked at Vitamin Planet: £16.21
Questions about this product
How much does Quest Forte D 4000IU cost per 1,000 IU?
7p per 1,000 IU, from £16.21 for 60 tablets at Vitamin Planet, checked on 7 October 2026.
Is it the cheapest vitamin D3 in the UK?
No, it is 84th of 207. High-Strength Vitamin D3 Tablets at WeightWorld works out at 1p per 1,000 IU.
How long does one pack last?
8 months at one 1,000 IU dose. The pack holds 240,000 IU in total.
About Quest
All 15 Quest products, priced per dose
More from Quest
- Vitamin D 2500IU (50% Extra Free)vitamin D3 · 90 tablets5p per 1,000 IUDetails and price history
- Vitamin D3 1000IUvitamin D3 · 90 tablets12p per 1,000 IUDetails and price history
- Kyolic Garlic 600mg Extractaged garlic extract · 30 tablets41p per 600 mgDetails and price history
- Vegan Glucosamine Sulphate KCI 1500mgglucosamine sulphate · 60 tablets27p per 1.5 gDetails and price history
