Magnesium, 90 capsules
£38.99 for 90 capsules at Healf. That works out at 52p per 100 mg magnesium, which ranks it 1st of the 10 magnesium L-threonate products we price across 1 UK retailer.
At one 100 mg dose a day, this pack lasts 2 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 × 250 mg = 7.5 g
- £38.99 ÷ 7.5 g × 100 mg = 52p per 100 mg magnesium
- A week 52p × 7 = £3.64 · a month × 30 = £15.60 · a year × 365 = £189.75
- 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.
How it compares: magnesium L-threonate
All 10, ranked →
Ranked purely by price per 100 mg magnesium. 5 combination products also contain magnesium.
On the label
- Magnesium · L-threonate
- 250 mg per serving (stated on the label)
- Pack
- 90 capsules · 30 servings · 3 capsule(s) a serving
- Cost per serving
- £1.30 (30 servings in the pack)
More label details
- Sold by
- Healf
- What the listing says
- “90 caps” · “Servings Per Container: 30” · “Serving Size: 3 Capsules” · “Magnesium Citrate) ; 250 mg” · “from 2300 mg Of Magnesium Proprietary Blend”
Ingredients
Elemental Magnesium (from 2300 mg Of Magnesium Proprietary Blend - Magtein® (Magnesium L-Threonate), Magnesium Bisglycinate Chelate, Magnesium Citrate), Vegetable Capsule (HPMC), Rice Hull (Ground)
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: 3 capsules.
What you paid
Optional. At Healf today: £38.99.
“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
- £38.99Healf
- First recorded
- £38.991 Oct
- Checked on
- 20 dayssince 1 Oct
- First checked at Healf: £38.99
Questions about this product
How much does Arrae Magnesium cost per 100 mg magnesium?
52p per 100 mg magnesium, from £38.99 for 90 capsules at Healf, checked on 20 October 2026.
Is it the cheapest magnesium L-threonate in the UK?
Yes. Of the 10 we price across 1 UK retailer, this is the cheapest per 100 mg magnesium.
How long does one pack last?
2 months at one 100 mg dose. The pack holds 7.5 g in total.