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Home › Minerals › Magnesium

Magnesium Chloride

Also called mag, mg glycinate, mag glycinate and 8 more

magnesium bisglycinate, magnesium citrate, magnesium malate, magnesium taurate, magnesium threonate, magtein, magnesium oxide, magnesium chloride.

The best price per 100 mg magnesium and per month across 2 UK retailers, and where to buy it cheapest. A unit for comparing, not advice.

Comparing magnesium

We count the magnesium a label states per serving, whatever the pack size or the serving size, so every product sits on one scale. Magnesium comes as bisglycinate (glycinate), citrate, malate, taurate, L-threonate, oxide, chloride, and blends and other forms, and each form has its own table, because someone buying one would not usually take another as a like-for-like substitute. Products that combine magnesium with other ingredients are listed separately, because their price buys more than magnesium. 100 mg is our unit for comparing prices, not a dose to take: the label’s directions and a pharmacist decide that.

Prices last checked: . Ranked purely by price per 100 mg magnesium — a comparison unit, not a recommendation. We earn commission when you buy through these links; it never affects the order.

Compared at 100 mg. Enter the amount you take to see your own costs.

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Magnesium, Chloride: products ranked by price per 100 mg magnesium
RankProductPer 100 mg magnesiumPer monthLastsBuyHow it is worked out
1
Trace Mega-Mag
Cheapest per doseMega-MagHealf · 118 ml · 29.5 servings · 360 mg a servingDetails and price historyAdd to my stackalso contains chloride
16p£4.803 months£16.99View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • 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
  • Amount per serving: stated on the label.
  • Also contains: chloride. The price counts the magnesium only.
What the retailer's listing says
  • pack units “118ml”
  • servings stated “Servings Per Container: About 30”
  • units per serving “Serving Size: 0.8 tsp (4mL)”
  • amount per serving “Magnesium ; 360 mg ; 96%”

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2
KIKI Health Ionic Magnesium Liquid Concentrate
Ionic Magnesium Liquid ConcentrateHealf · 50 ml · 25 servings · 120 mg a servingDetails and price historyAdd to my stack
52p£15.5030 days£15.50View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 50 ÷ 2 per serving = 25
  • In the pack: 25 × 120 mg = 3 g
  • £15.50 ÷ 3 g × 100 mg = 51.7p per 100 mg
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “50 ml”
  • units per serving “30 drops (2 dropper squeezes - 2ml)”
  • amount per serving “120mg magnesium per serving (32% RI)”

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3
Eidon Liquid Ionic Magnesium - 2oz
Liquid Ionic Magnesium - 2ozHealf · 30 servings · 80 mg a servingDetails and price historyAdd to my stack
65p£19.3624 days£15.49View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 30 (as stated on the label)
  • In the pack: 30 × 80 mg = 2.4 g
  • £15.49 ÷ 2.4 g × 100 mg = 64.5p per 100 mg
  • Amount per serving: stated on the label.
What the retailer's listing says
  • servings stated “Servings Per Container: 30”
  • units per serving “Serving Size: 30 Drops (2ml)”
  • amount per serving “Magnesium (as Magnesium Chloride) ; 80 mg”

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4
KIKI Health Ionic Magnesium Liquid Concentrate
Ionic Magnesium Liquid ConcentrateMyprotein · 50 ml · 25 servings · 120 mg a servingDetails and price historyAdd to my stack
67p£20.0030 days£20.00View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 50 ÷ 2 per serving = 25
  • In the pack: 25 × 120 mg = 3 g
  • £20.00 ÷ 3 g × 100 mg = 66.7p per 100 mg
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “50ml”
  • units per serving “30 drops (2ml)”
  • amount per serving “Magnesium 120mg - 32% of the Reference Intake”

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By shop

Each shop's magnesium products, with where its cheapest sits in the market.

How we work out these prices

We count the elemental magnesium a product provides, not the weight of the whole compound it comes in. If a label states the magnesium amount, we use it. If it only gives the compound's weight, we estimate using a published conversion factor and mark the figure “estimated”. If we cannot tell which the number means, the product is left out until it can be confirmed.

Conversion factor used when only the compound weight is given: chloride 12.0%. How we chose these.

Our full method · All magnesium forms