Magnesium Citrate 90 Tablets
£9.19 for 90 tablets at Holland & Barrett. That works out at 10p per 100 mg magnesium, which ranks it 13th of the 38 magnesium citrate products we price across 12 UK retailers.
At one 100 mg dose a day, this pack lasts 3 months. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 90 ÷ 3 per serving = 30
- In the pack: 30 × 300 mg = 9 g
- £9.19 ÷ 9 g × 100 mg = 10.2p per 100 mg magnesium
- A week 10.2p × 7 = 71p · a month × 30 = £3.06 · a year × 365 = £37.27
- 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 magnesium citrate
All 38, ranked →
Cheapest anywhere: 2p per 100 mg magnesium at Simply Supplements.
Ranked purely by price per 100 mg magnesium. 187 combination products also contain magnesium.
On the label
- Magnesium · Citrate
- 300 mg per serving (stated on the label)
- Pack
- 90 tablets · 30 servings · 3 tablet(s) a serving
- Cost per serving
- 31p (30 servings in the pack)
More label details
- Sold by
- Holland & Barrett
- What the listing says
- “90 Tablets” · “Take three tablets daily” · “Magnesium ; 300mg”
Ingredients
Magnesium Citrate, Bulking Agent (Microcrystalline Cellulose), Maltodextrin, Anti-Caking Agent (Magnesium Stearate).
From the Holland & Barrett listing. Check the pack itself if you have an allergy: labels mark allergens in bold.
Price alert
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One 100 mg dose is our comparison unit, not a recommendation.
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Filled in from the label’s serving: 3 tablets.
What you paid
Optional. At Holland & Barrett today: £9.19.
Bought it? We email you once, on , the day to reorder by, so it does not run out. No stack needed.
“Order by” allows 3 working days’ delivery from Holland & Barrett and your spare days.
Price history
No price change since 17 September 2026. Checked on 3 days, most recently 22 October 2026.
- Price at every check
- £9.19Holland & Barrett
- First recorded
- £9.1917 Sept
- Checked on
- 3 dayssince 17 Sept
- First checked at Holland & Barrett: £9.19
Questions about this product
How much does Holland & Barrett Magnesium Citrate 90 Tablets cost per 100 mg magnesium?
10p per 100 mg magnesium, from £9.19 for 90 tablets at Holland & Barrett, checked on 22 October 2026.
Is it the cheapest magnesium citrate in the UK?
No, it is 13th of 38. Magnesium Citrate Tablets 700mg at Simply Supplements works out at 2p per 100 mg magnesium.
How long does one pack last?
3 months at one 100 mg dose. The pack holds 9 g in total.
About Holland & Barrett
Founded 1870 · Nuneaton, England · Part of L1 Retail (LetterOne)
Holland & Barrett is a health and wellness retailer founded in 1870, when Alfred Slapps Barrett and Major William Holland opened a grocery shop in Bishop's Stortford. It is based in Nuneaton, Warwickshire, and has been owned by LetterOne's L1 Retail since 2017.
All 32 Holland & Barrett products, priced per doseVisit Holland & Barrett (opens in a new tab)
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