Magnesium Tablets 200mg, 360 tablets
£19.29 for 360 tablets at Simply Supplements. That works out at 5p per 100 mg magnesium, which ranks it 3rd of the 9 magnesium oxide products we price across 4 UK retailers.
At one 100 mg dose a day, this pack lasts 12 months. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 360 ÷ 1 per serving = 360
- In the pack: 360 × 100 mg = 36 g
- £19.29 ÷ 36 g × 100 mg = 5.36p per 100 mg magnesium
- A week 5.36p × 7 = 38p · a month × 30 = £1.61 · a year × 365 = £19.56
- 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 oxide
All 9, ranked →
Switching to the Boots pack saves 47p a month at the same 100 mg dose.
Ranked purely by price per 100 mg magnesium. 91 combination products also contain magnesium.
On the label
- Magnesium · Oxide
- 100 mg per serving (stated on the label)
- Pack
- 360 tablets · 360 servings · 1 tablet(s) a serving
- Cost per serving
- 5p (360 servings in the pack)
More label details
- Barcode
- 5056049518032
- Sold by
- Simply Supplements
- What the listing says
- “provides 100mg of bioavailable magnesium” · “Each of our magnesium tablets contains 167mg of magnesium oxide” · “confirmed from the retailer's own product page, not this listing's text: pack units 360; pack unit type tablet; units per serving 1.0”
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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: 1 tablet.
What you paid
Optional. At Simply Supplements today: £19.29.
“Order by” allows 3 working days’ delivery from Simply Supplements and your spare days.
Price history
No price change since 21 September 2026. Checked on 29 days, most recently 20 October 2026.
- Price at every check
- £19.29Simply Supplements
- First recorded
- £19.2921 Sept
- Checked on
- 29 dayssince 21 Sept
- First checked at Simply Supplements: £19.29
Questions about this product
How much does Simply Supplements Magnesium Tablets 200mg cost per 100 mg magnesium?
5p per 100 mg magnesium, from £19.29 for 360 tablets at Simply Supplements, checked on 20 October 2026.
Is it the cheapest magnesium oxide in the UK?
No, it is 3rd of 9. Magnesium 375mg 180 Tablets (3 month supply) at Boots works out at 4p per 100 mg magnesium.
How long does one pack last?
12 months at one 100 mg dose. The pack holds 36 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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