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BootsVitamins

High Strength Vitamin C + Vitamin D 20 Effervescent Tablets, 20 tablets

£2.25 for 20 tablets at Boots. That works out at 11p per 1 g, which ranks it 29th of the 113 vitamin C products we price across 21 UK retailers.

What it really costs, per 1 g11pOne 1 g dose is our comparison unit for vitamin C. It is not a recommendation.
A day11p
A week79p
A month£3.38
A year£41.06

At one 1 g dose a day, this pack lasts 20 days. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Vitamin C

  • Servings: 20 ÷ 1 per serving = 20
  • In the pack: 20 × 1 g = 20 g
  • £2.25 ÷ 20 g × 1 g = 11.3p per 1 g
  • A week 11.3p × 7 = 79p · a month × 30 = £3.38 · a year × 365 = £41.06
  • Amount per serving: stated on the label.

Vitamin D3

  • Servings: 20 ÷ 1 per serving = 20
  • In the pack: 20 × 1,000 IU = 20,000 IU
  • £2.25 ÷ 20,000 IU × 1,000 IU = 11.3p per 1,000 IU
  • A week 11.3p × 7 = 79p · a month × 30 = £3.38 · a year × 365 = £41.06
  • 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 C

All 113, ranked →
Vitamin C 1000mg PowderSimply Supplements · 1 g a serving · £3.05 a month · a pack lasts 4 months10p£12.69View at Simply Supplements (opens in a new tab)
Vitamin C Timed ReleaseHealf · 1 g a serving · £3.10 a month · a pack lasts 5 months10p£15.49View at Healf (opens in a new tab)
Vitamin C 1000mg with Rosehip 800mgSimply Supplements · 1 g a serving · £3.22 a month · a pack lasts 6 months11p£19.29View at Simply Supplements (opens in a new tab)
ZipVitChewable Vitamin C 1000mgZipVit · 1 g a serving · £3.33 a month · a pack lasts 3 months11p£9.99View at ZipVit (opens in a new tab)
Vitamin C & Zinc 90 Tablets (3 months supply)Boots · 500 mg a serving · £3.33 a month · a pack lasts 45 days11p£5.00View at Boots (opens in a new tab)
This productBoots · 1 g a serving · £3.38 a month · a pack lasts 20 days11pshown above

Switching to the Simply Supplements pack saves 33p a month at the same 1 g dose.

Ranked purely by price per 1 g. 950 combination products also contain vitamin C.

Cheaper vitamin D3

All 207, ranked →
Transparent LabsVitamin D3 + K2Healf · 5,000 IU a serving · £3.20 a month · a pack lasts 10 months11p£31.99View at Healf (opens in a new tab)
Vitamin D3 1000iu 120 TabletsHealthspan · 1,000 IU a serving · £3.25 a month · a pack lasts 4 months11p£12.99View at Healthspan (opens in a new tab)
Well.Actually.Liposomal Vitamin D3+K2 2000-4000IU Orange & MangoVitamin Planet · 2,000 IU a serving · £3.31 a month · a pack lasts 8 months11p£26.50View at Vitamin Planet (opens in a new tab)
Well.Actually.Liposomal Vitamin D3+K2 2000-4000IU Summer CitrusVitamin Planet · 2,000 IU a serving · £3.31 a month · a pack lasts 8 months11p£26.50View at Vitamin Planet (opens in a new tab)
Folic Acid 400 µg + Vitamin D TabletsBoots · 400 IU a serving · £3.33 a month · a pack lasts 2 months11p£8.00View at Boots (opens in a new tab)
This productBoots · 1,000 IU a serving · £3.38 a month · a pack lasts 20 days11pshown above

Switching to the Healf pack saves 18p 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 C · Standard (ascorbic acid and ascorbates)
1 g per serving (stated on the label)
Vitamin D3 · Vitamin D3
1,000 IU per serving (stated on the label)
Pack
20 tablets · 20 servings · 1 tablet(s) a serving
Cost per serving
11p (20 servings in the pack)
More label details
Sold by
Boots
What the listing says
“20 Effervescent Tablets” · “Take 1 tablet per day dissolved in a glass of water” · “Vitamin C ; 1000 mg ; 1250”
Ingredients

Acid (Citric Acid), Acidity Regulator (Sodium Hydrogen Carbonate), Vitamin C, Bulking Agent (Sorbitol), Flavourings (Natural Orange with other Natural Flavourings, Natural Citrus Flavouring), Starch, Sweeteners (Sodium Cyclamate, Sodium Saccharin), Colours (Beetroot Juice Powder (Maltodextrin, Beetroot Juice Concentrate, Citric Acid), Riboflavin 5’-phosphate), Vitamin D3 (Cholecalciferol).

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

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

Price history

No price change since 23 September 2026. Checked on 2 days, most recently 15 October 2026.

Price at every check
£2.25Boots
First recorded
£2.2523 Sept
Checked on
2 dayssince 23 Sept
Pack price at each check.
  1. First checked at Boots: £2.25

Questions about this product

How much does Boots High Strength Vitamin C + Vitamin D 20 Effervescent Tablets cost per 1 g?

11p per 1 g, from £2.25 for 20 tablets at Boots, checked on 15 October 2026.

Is it the cheapest vitamin C in the UK?

No, it is 29th of 113. Vitamin C Plus Tablets at Myprotein works out at 3p per 1 g.

How long does one pack last?

20 days at one 1 g dose. The pack holds 20 g in total.

How much does Boots High Strength Vitamin C + Vitamin D 20 Effervescent Tablets cost per 1,000 IU?

11p per 1,000 IU, from £2.25 for 20 tablets at Boots, checked on 15 October 2026.

Is it the cheapest vitamin D3 in the UK?

No, it is 118th of 207. High-Strength Vitamin D3 Tablets at WeightWorld works out at 1p per 1,000 IU.

How long does one pack last?

20 days at one 1,000 IU dose. The pack holds 20,000 IU in total.

About Boots

Founded 1849 · Nottingham, England · Part of The Boots Group

Boots is a pharmacy-led health and beauty retailer founded in 1849, when John Boot opened a herbalist shop in Nottingham, where it is still based. com. It belongs to The Boots Group, owned since August 2025 by the private equity firm Sycamore Partners and Stefano Pessina's family.

All 96 Boots products, priced per doseVisit Boots (opens in a new tab)

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