Magtein, 90 capsules
£32.81 for 90 capsules at Healf. That works out at 76p per 100 mg magnesium, which ranks it 4th of the 10 magnesium L-threonate products we price across 1 UK retailer.
At one 100 mg dose a day, this pack lasts 43 days. 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 × 144 mg = 4.32 g
- £32.81 ÷ 4.32 g × 100 mg = 75.9p per 100 mg magnesium
- A week 75.9p × 7 = £5.32 · a month × 30 = £22.78 · a year × 365 = £277.21
- 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 L-threonate
All 10, ranked →
Switching to the Healf pack saves £7.19 a month at the same 100 mg dose.
Ranked purely by price per 100 mg magnesium. 5 combination products also contain magnesium.
On the label
- Magnesium · L-threonate
- 144 mg per serving (stated on the label)
- Pack
- 90 capsules · 30 servings · 3 capsule(s) a serving
- Cost per serving
- £1.09 (30 servings in the pack)
More label details
- Sold by
- Healf
- What the listing says
- “90 caps” · “Servings Per Container 30” · “Serving Size 3 Veg Capsules” · “magnesium L-threonate) ; 144 mg” · “from 2,000 mg Magtein® magnesium L-threonate”
Ingredients
Magtein® (Magnesium L-Threonate) (2 g), Magnesium (Elemental) (from 2,000 mg Magtein® Magnesium L-Threonate), Hypromellose (Cellulose Capsule), Rice Flour, Stearic Acid (Vegetable Source), Anti-Caking Agent (Silicon Dioxide)
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: £32.81.
“Order by” allows 3 working days’ delivery from Healf and your spare days.
Price history
4 price changes since 1 October 2026. Checked on 20 days, most recently 20 October 2026.
- Lowest recorded
- £31.011 Oct
- Highest recorded
- £32.8117 Oct
- First recorded
- £31.011 Oct
- Checked on
- 20 dayssince 1 Oct
- Up at Healf: £32.39 → £32.81 (+1.3%)
- Up at Healf: £31.01 → £32.39 (+4.5%)
- Down at Healf: £31.91 → £31.01 (−2.8%)
2 earlier entries
- Up at Healf: £31.01 → £31.91 (+2.9%)
- First checked at Healf: £31.01
Questions about this product
How much does NOW Foods Magtein cost per 100 mg magnesium?
76p per 100 mg magnesium, from £32.81 for 90 capsules at Healf, checked on 20 October 2026.
Is it the cheapest magnesium L-threonate in the UK?
No, it is 4th of 10. Magnesium at Healf works out at 52p per 100 mg magnesium.
How long does one pack last?
43 days at one 100 mg dose. The pack holds 4.32 g in total.
About NOW Foods
All 109 NOW Foods products, priced per dose
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