Best Magnesium Supplements in Australia

Magnesium labels can be confusing, because some list the weight of the whole compound and others list the magnesium you actually get. This page shows our top magnesium supplement picks at Supps247, starting with what our customers buy most in our stores and online. We then checked each label for the magnesium form, elemental magnesium per serve and serve size, so you can compare like with like. Updated October 2026.

Our top picks at a glance

1. Magnesium Glycinate by NOW Foods: best overall

NOW Magnesium Glycinate is our top pick because the label is clear and the dose is sensible. Two tablets give 200 mg of elemental magnesium from Albion magnesium bisglycinate, which sits comfortably under the Australian upper limit for supplemental magnesium. It is labelled vegetarian and vegan, it is one of our best-selling magnesium products, and the 180 tablet bottle keeps the price per serve low.

• Serve: 2 tablets
• Magnesium: 200 mg elemental, from magnesium bisglycinate (Albion)
• 180 tablets, 90 serves
• Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients (made in a facility that handles them)

Worth knowing: the serve is two tablets, which are not small. Supps247 also lists a 60 count variant of this product; check that label for its serve size and magnesium amount, as the details above are for the 180 tablet bottle.

View Magnesium Glycinate by NOW Foods

2. Beast Labs Magnesium Bi-Glycinate 750mg: best budget capsule

Beast Labs Magnesium Bi-Glycinate is the magnesium our customers buy most. It is a simple bottle of 60 capsules of magnesium bi-glycinate, the chelated form where magnesium is bound to the amino acid glycine. It is also the lowest-priced bottle among our picks. The one thing to understand is what the 750 mg on the front actually means.

• Form: magnesium bi-glycinate
• 750 mg of magnesium bi-glycinate, as printed on the front label
• 150 mg elemental magnesium per capsule, per the nutrition panel
• 60 capsules per bottle

Worth knowing: 750 mg is the weight of the whole magnesium bi-glycinate compound. The nutrition panel lists it as standardised to 20% magnesium, which gives 150 mg of elemental magnesium per capsule, so compare that figure, not the 750 mg, with the other picks.

View Beast Labs Magnesium Bi-Glycinate 750mg

3. Magnesium Glycinate 1330 mg by Horbaach: best big bottle

Horbaach is a good example of reading past the front label. The bottle says 1,330 mg, but the supplement facts show that two capsules provide 240 mg of elemental magnesium from a buffered blend of magnesium bisglycinate chelate and magnesium oxide. With 250 capsules (125 serves) it is the largest bottle on this page, and its price per milligram of magnesium is among the lowest we found.

• Serve: 2 quick release capsules
• Magnesium: 240 mg, from 1,330 mg of buffered magnesium glycinate chelate (magnesium bisglycinate chelate and magnesium oxide)
• 250 capsules, 125 serves
• Other ingredients: gelatin capsule, rice powder, vegetable magnesium stearate, silica
• Label states no gluten, wheat, yeast, milk, lactose, soy or artificial sweeteners

Worth knowing: it is not pure glycinate, as part of the magnesium comes from magnesium oxide, and the capsules are gelatin, so it does not suit vegetarians.

View Magnesium Glycinate 1330 mg by Horbaach

4. MAG X4 by ATP Science: best powder

MAG X4 is for people who would rather drink their magnesium than swallow capsules. A 2.5 g scoop of the berry-flavoured powder gives 150 mg of magnesium from four forms: orotate dihydrate, bisglycinate, threonate and citrate. It is almost free of sugar and calories, and it suits people who already have a daily drink routine.

• Serve: 2.5 g; 40 serves per 100 g tub
• Magnesium: 150 mg per serve
• Compounds per serve: magnesium orotate dihydrate 540 mg, bisglycinate 530 mg, threonate 450 mg, citrate 230 mg
• Sugars: 0.1 g per serve; sweetened with thaumatin, coloured with beet red extract

Worth knowing: it only comes in Berry flavour at Supps247, and a powder is less convenient to carry than capsules. Keep it below 25 degrees and away from moisture, as the label directs.

View MAG X4 by ATP Science

5. Premium Magnesium Glycinate by Piping Rock: best softgel

If you find tablets hard to swallow, Piping Rock uses quick release softgels. The full serve of three softgels provides 375 mg of magnesium as magnesium glycinate, the highest dose among our picks, with each softgel working out to about 125 mg. The bottle holds 130 softgels, or 43 full serves.

• Serve: 3 quick release softgels
• Magnesium: 375 mg, as magnesium glycinate
• 130 softgels, 43 serves
• Other ingredients: rice bran oil, gelatin, vegetable glycerin, sunflower lecithin, caramel colour, calcium carbonate

Worth knowing: a full serve of 375 mg is above the Australian upper level of 350 mg a day for magnesium from supplements, so talk to your doctor or pharmacist before taking the full serve every day. The softgels contain gelatin.

View Premium Magnesium Glycinate by Piping Rock

6. Magnesium Glycinate 500mg by Deal Supplement: best for a lower, adjustable dose

Deal Supplement uses one vegetarian capsule per serve, each giving 90 mg of magnesium from 500 mg of magnesium glycinate. That smaller dose suits people who get a fair amount of magnesium from food and only want a top-up, or who prefer to build up slowly. The 240 capsule bottle lasts a long time, and the label lists only rice flour and a vegetable cellulose capsule as other ingredients.

• Serve: 1 vegetarian capsule
• Magnesium: 90 mg, from 500 mg magnesium glycinate
• 240 capsules, 240 serves
• Other ingredients: rice flour, vegetable cellulose (capsule)

Worth knowing: the 500 mg on the front is the compound weight. At 90 mg per capsule it gives less magnesium per serve than the other picks, so compare cost per milligram rather than per capsule.

View Magnesium Glycinate 500mg by Deal Supplement

7. Life Extension Neuro-Mag Magnesium L-Threonate: best magnesium L-threonate

Neuro-Mag uses Magtein magnesium L-threonate, a form Life Extension positions for brain and cognitive support rather than general magnesium top-ups. Three vegetarian capsules give 144 mg of magnesium from 2,000 mg of magnesium L-threonate. It is the most specialised pick on this page and suits people who specifically want this form rather than the most magnesium for the money.

• Serve: 3 vegetarian capsules
• Magnesium: 144 mg, from 2,000 mg Magtein magnesium L-threonate
• 90 capsules, 30 serves
• Other ingredients: vegetable cellulose (capsule), microcrystalline cellulose, stearic acid, vegetable stearate, silica

Worth knowing: it is by far the most expensive way to get magnesium on this page, roughly four to six times the cost per milligram of the glycinate picks, and the three capsule serve means a 90 count bottle lasts one month.

View Life Extension Neuro-Mag Magnesium L-Threonate

How we chose

We started with the magnesium supplements that sold the most units across Supps247 stores and online in the last six months, then added lower-selling products that cover a different need, such as a powder, a softgel or a lower dose. We checked form, elemental magnesium per serve and serve size against brand labels and label images in October 2026. Value tiers are based on price per serve at the time of writing. Brands do not pay to be included.

How to choose a magnesium supplement

Compare elemental magnesium, not the big number on the front. The NIH Office of Dietary Supplements explains that supplement facts panels declare elemental magnesium, not the weight of the whole compound (NIH ODS magnesium fact sheet). Front labels often show the compound weight instead. Horbaach is a good example: 1,330 mg on the front, 240 mg of magnesium per serve on the back.

Know your daily target and the upper limit. Australia's Nutrient Reference Values set the recommended intake at 400 to 420 mg a day for adult men and 310 to 320 mg for adult women, from all sources. The upper level of intake for magnesium from supplements is 350 mg a day for adults, because diarrhoea is the first sign of too much (Eat for Health NRVs). Magnesium from food does not count towards that limit.

Think about the form. The NIH notes that forms which dissolve well in liquid tend to be absorbed better, and that aspartate, citrate, lactate and chloride tend to have higher bioavailability than oxide and sulphate. Its fact sheet does not rate glycinate. The forms most commonly linked to diarrhoea are carbonate, chloride, gluconate and oxide. Most picks here use glycinate or bisglycinate, a chelated form where magnesium is bound to the amino acid glycine.

Pick a format you will actually take. Options here include tablets, capsules, softgels and a flavoured powder. If you avoid animal products, look for vegetarian capsules or tablets (NOW, Deal Supplement and Neuro-Mag), as Horbaach and Piping Rock use gelatin.

Check your medicines. Magnesium can reduce absorption of some antibiotics and osteoporosis medicines, and some diuretics and long-term reflux medicines affect magnesium levels, according to the NIH. Ask your pharmacist about timing.

Training hard in the heat? Magnesium is also found in many hydration products, so see our best electrolytes guide, or browse the full magnesium range.

FAQs

What is elemental magnesium?

Elemental magnesium is the amount of actual magnesium in a supplement. Magnesium is always bound to something else, such as glycine or citrate, so the compound weighs much more than the magnesium it contains. For example, Deal Supplement's 500 mg of magnesium glycinate provides 90 mg of magnesium. Always compare the elemental figure on the supplement facts panel.

How much magnesium should I take?

Follow the label. Australian guidelines recommend 400 to 420 mg a day for adult men and 310 to 320 mg for adult women from all sources, including food. The upper level for magnesium from supplements is 350 mg a day for adults. Most of our picks provide between 90 mg and 240 mg per serve.

Which form of magnesium is best absorbed?

The NIH says forms that dissolve well in liquid tend to be absorbed better, and that aspartate, citrate, lactate and chloride tend to have higher bioavailability than oxide and sulphate. It does not rate glycinate either way. Choose a form you tolerate and a dose you can take consistently.

Does magnesium help with muscle cramps?

The evidence is weak. A 2020 Cochrane review concluded it is unlikely that magnesium provides clinically meaningful cramp prevention for older adults, found conflicting results for cramps in pregnancy, and found no randomised trials for exercise-associated cramps. If cramps are frequent or severe, see your doctor.

Can magnesium upset my stomach?

It can at higher doses. Diarrhoea is the first sign of too much supplemental magnesium, which is why the adult upper level is 350 mg a day from supplements. The NIH lists carbonate, chloride, gluconate and oxide as the forms most often linked to diarrhoea. Several labels on this page suggest taking it with a meal, and a pharmacist can help if you notice loose stools.

Can I take magnesium with my medicines?

Check with your pharmacist first. The NIH notes magnesium can reduce absorption of some antibiotics and bisphosphonates, so doses usually need to be spaced apart. Some diuretics and long-term use of reflux medicines called proton pump inhibitors can also change magnesium levels in the body.

Sources: Eat for Health, Nutrient Reference Values: magnesium; NIH Office of Dietary Supplements, magnesium fact sheet for health professionals; Garrison and colleagues, Magnesium for skeletal muscle cramps, Cochrane Database of Systematic Reviews (2020); label details from NOW Foods, Life Extension and product label images for Horbaach, ATP Science, Piping Rock, Deal Supplement and Beast Labs.

Order online with Australia-wide delivery, free on orders of $100 or more, or visit a Supps247 store in Melbourne, regional Victoria or Brisbane to compare products in person before you buy. Members can use our price match guarantee on full-priced items.

Always read the label and follow the directions for use. If you have a medical condition, are pregnant or take regular medication, check with your doctor first.