Magnesium Citrate, 90 capsules
£9.99 for 90 capsules at Healf. That works out at 7p per 100 mg magnesium, which ranks it 5th of the 38 magnesium citrate products we price across 12 UK retailers.
At one 100 mg 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
- Servings: 90 ÷ 1 per serving = 90
- In the pack: 90 × 170 mg = 15.3 g
- £9.99 ÷ 15.3 g × 100 mg = 6.53p per 100 mg magnesium
- A week 6.53p × 7 = 46p · a month × 30 = £1.96 · a year × 365 = £23.83
- 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 →
Ranked purely by price per 100 mg magnesium. Labels here do not all state the same thing: this one gives stated on the label, the cheapest gives estimated from the compound weight using our conversion factor. Check both before choosing. 187 combination products also contain magnesium.
On the label
- Magnesium · Citrate
- 170 mg per serving (stated on the label)
- Pack
- 90 capsules · 90 servings · 1 capsule(s) a serving
- Cost per serving
- 11p (90 servings in the pack)
More label details
- Sold by
- Healf
- What the listing says
- “90 caps” · “Servings Per Container: 90” · “Serving Size: 1 Capsule” · “Magnesium (as Magnesium Citrate) ; 170 mg”
Ingredients
Magnesium (as Magnesium Citrate), Capsule Shell (Hydroxypropyl Methylcellulose), Anti-Caking Agent (Magnesium Stearate), Anti-Caking Agent (Silicon Dioxide), Bulking Agent (Microcrystalline Cellulose)
From the Healf listing. Check the pack itself if you have an allergy: labels mark allergens in bold.
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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: 1 capsule.
What you paid
Optional. At Healf today: £9.99.
“Order by” allows 3 working days’ delivery from Healf and your spare days.
Price history
No price change since 1 October 2026. Checked on 20 days, most recently 20 October 2026.
- Price at every check
- £9.99Healf
- First recorded
- £9.991 Oct
- Checked on
- 20 dayssince 1 Oct
- First checked at Healf: £9.99
Questions about this product
How much does Allergy Research Group Magnesium Citrate cost per 100 mg magnesium?
7p per 100 mg magnesium, from £9.99 for 90 capsules at Healf, checked on 20 October 2026.
Is it the cheapest magnesium citrate in the UK?
No, it is 5th of 38. Magnesium Citrate Tablets 700mg at Simply Supplements works out at 2p per 100 mg magnesium.
How long does one pack last?
5 months at one 100 mg dose. The pack holds 15.3 g in total.