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TraceMinerals

Mega-Mag, 118 ml

£16.99 for 118 ml at Healf. That works out at 16p per 100 mg magnesium, which ranks it 1st of the 4 magnesium chloride products we price across 2 UK retailers.

What it really costs, per 100 mg magnesium16pOne 100 mg dose is our comparison unit for magnesium. It is not a recommendation.
A day16p
A week£1.12
A month£4.80
A year£58.39

At one 100 mg dose a day, this pack lasts 3 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

  • Servings: 118 ÷ 4 per serving = 29.5
  • In the pack: 29.5 × 360 mg = 10.6 g
  • £16.99 ÷ 10.6 g × 100 mg = 16p per 100 mg magnesium
  • A week 16p × 7 = £1.12 · a month × 30 = £4.80 · a year × 365 = £58.39
  • 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 chloride

All 4, ranked →
This productCheapest per 100 mg magnesiumHealf · 360 mg a serving · £4.80 a month · a pack lasts 3 months16pshown above
Ionic Magnesium Liquid ConcentrateHealf · 120 mg a serving · £15.50 a month · a pack lasts 30 days52p£15.50View at Healf (opens in a new tab)

Ranked purely by price per 100 mg magnesium. 3 combination products also contain magnesium.

On the label

Magnesium · Chloride
360 mg per serving (stated on the label)
Pack
118 ml · 29.5 servings · 4 ml a serving
Cost per serving
58p (29.5 servings in the pack)
More label details
Sold by
Healf
What the listing says
“118ml” · “Servings Per Container: About 30” · “Serving Size: 0.8 tsp (4mL)” · “Magnesium ; 360 mg ; 96%”
Ingredients

Concentrace® Trace Minerals, Sulfate

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.

Price history

No price change since 1 October 2026. Checked on 20 days, most recently 20 October 2026.

Price at every check
£16.99Healf
First recorded
£16.991 Oct
Checked on
20 dayssince 1 Oct
Pack price at each check.
  1. First checked at Healf: £16.99

Questions about this product

How much does Trace Mega-Mag cost per 100 mg magnesium?

16p per 100 mg magnesium, from £16.99 for 118 ml at Healf, checked on 20 October 2026.

Is it the cheapest magnesium chloride in the UK?

Yes. Of the 4 we price across 2 UK retailers, this is the cheapest per 100 mg magnesium.

How long does one pack last?

3 months at one 100 mg dose. The pack holds 10.6 g in total.

About Trace

All 26 Trace products, priced per dose

More from Trace

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All magnesiumEvery form, cheapest per 100 mg magnesium firstMagnesium Chloride4 products rankedMagnesium guideWhat it is, why people take it, how the forms differTraceAll 26 products from this brand, per doseMineralsEverything else we price in this categoryMagnesium price historyEvery magnesium product's price per dose and price historyBuild a basketThe cheapest way to buy several at onceHow we compareWhere every number on this page comes from