Magnesium Triple Complex, 120 capsules
£12.99 for 120 capsules at Simply Supplements. That works out at 6p per 100 mg magnesium, which ranks it 30th of the 79 magnesium blends and other forms we price across 15 UK retailers.
At one 100 mg dose a day, this pack lasts 8 months. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 120 ÷ 2 per serving = 60
- In the pack: 60 × 384 mg = 23 g
- £12.99 ÷ 23 g × 100 mg = 5.64p per 100 mg magnesium
- A week 5.64p × 7 = 39p · a month × 30 = £1.69 · a year × 365 = £20.58
- 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 blends and other forms
All 79, ranked →
Switching to the Simply Supplements pack saves 16p a month at the same 100 mg dose.
Ranked purely by price per 100 mg magnesium. 236 combination products also contain magnesium.
On the label
- Magnesium · Blends and other forms
- 384 mg per serving (stated on the label)
- Pack
- 120 capsules · 60 servings · 2 capsule(s) a serving
- Cost per serving
- 22p (60 servings in the pack)
More label details
- Claimed on the listing
- vegan
- Barcode
- 5056049520684
- Sold by
- Simply Supplements
- What the listing says
- “Serving Size: 2 Capsules” · “Serving Size: 2 Capsules” · “Magnesium Bisglycinate Providing Elemental Magnesium 1000mg 200mg” · “confirmed from the retailer's own product page, not this listing's text: form id other; amount per serving 384.0; amount unit mg; amount refers to elemental; pack units 120; pack unit type capsule; units per serving 2.0”
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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: 2 capsules.
What you paid
Optional. At Simply Supplements today: £12.99.
“Order by” allows 3 working days’ delivery from Simply Supplements and your spare days.
Price history
No price change since 23 September 2026. Checked on 27 days, most recently 20 October 2026.
- Price at every check
- £12.99Simply Supplements
- First recorded
- £12.9923 Sept
- Checked on
- 27 dayssince 23 Sept
- First checked at Simply Supplements: £12.99
Questions about this product
How much does Simply Supplements Magnesium Triple Complex cost per 100 mg magnesium?
6p per 100 mg magnesium, from £12.99 for 120 capsules at Simply Supplements, checked on 20 October 2026.
Is it the cheapest of the magnesium blends and other forms in the UK?
No, it is 30th of 79. Magnesium 500mg at ZipVit works out at 1p per 100 mg magnesium.
How long does one pack last?
8 months at one 100 mg dose. The pack holds 23 g in total.
About Simply Supplements
Founded 2004 · Yaxley, Peterborough, England
Simply Supplements is an online vitamins and supplements retailer that started in Guernsey in 2004 and is now based in Yaxley, near Peterborough. It is the trading name of Pinnacle Health Nutrition Ltd, a privately owned UK company.
All 134 Simply Supplements products, priced per doseVisit Simply Supplements (opens in a new tab)
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