Magnesium malate
Nothing about magnesium malate rates above Limited: the one blinded trial of magnesium with malic acid for fibromyalgia found no clear benefit over placebo, and the better results came only from open-label use without a placebo group.
It is an authorised source of magnesium in EU food supplements and is generally safe for adults with healthy kidneys, but the doses tried for fibromyalgia go above the 250–350 mg daily limits for supplemental magnesium, where loose stools become more likely. We found no human trial showing it gives more energy or is better absorbed than other forms.
At a glance
Last reviewed 10 October 2026What it's used for
Evidence is rated per use. The same ingredient can be strong for one thing and traditional for another.
| Use | Evidence | What the research shows |
|---|---|---|
| Fibromyalgia pain and tendernessCompare remedies for joints and inflammation → | Limited | In a blinded crossover pilot of 24 people (20 analysed), tablets giving 300 mg magnesium and 1,200 mg malic acid a day for 4 weeks showed no clear benefit over placebo on pain or tenderness. In a following 6-month open-label phase with doses up to 600 mg magnesium a day, pain and tenderness scores fell, but with no placebo group that cannot separate the supplement from placebo effects. An Epistemonikos evidence summary concluded the combination makes little or no difference to pain or depressive symptoms.1,2,3 |
| Muscle cramps | Limited | A 2020 Cochrane review of 11 trials of magnesium in any form found it unlikely to give meaningful protection against cramps in older adults: cramps per week fell by only 0.18 more than on placebo, a difference that could be chance (moderate-certainty evidence). Results in pregnancy were conflicting. We found no cramp trial of magnesium malate itself.4 |
| Topping up magnesium intake | Limited | Magnesium malate is on the EU list of permitted magnesium sources for food supplements. EFSA reviewed an unpublished crossover study in 14 healthy volunteers given a single 150 mg dose: blood magnesium rose more after a malate product than after magnesium oxide, and about as much as after bisglycinate. EFSA judged its availability similar to other permitted sources. No study we found tested it in people with low magnesium.5 |
How much
Ranges below are what studies used and what supplements commonly contain. They are not a recommendation for you. Start at the low end.
How people take it
Safety
Who should avoid
- Severe kidney impairment — magnesium can build up (hypermagnesaemia)
- Pregnancy and breastfeeding — ask a clinician about dose first
- Children — the EU sets no upper limit for ages 1–3 and 250 mg only from age 4
- On regular medicines — check with a pharmacist first
Known interactions
Questions people ask
Does magnesium malate help fibromyalgia?
Probably not much, on the evidence we found. The only blinded trial of magnesium with malic acid found no clear benefit over placebo after 4 weeks; improvements appeared only in an open-label phase with no placebo group, and an evidence summary concluded it makes little or no difference to pain.
Is magnesium malate good for energy or fatigue?
We found no human trial testing magnesium malate for energy or tiredness, so that claim is unproven. Malic acid takes part in the body's energy-producing chemistry, but that does not show that taking it as a supplement makes you less tired.
Is magnesium malate better absorbed than other forms?
Not clearly. In a small unpublished study reviewed by EFSA, blood magnesium rose more after malate than after magnesium oxide and about as much as after bisglycinate. Rat studies disagree: one found the largest rise with malate, while a Health Canada study found no meaningful difference between eight magnesium compounds, malate included.
How much magnesium malate is too much?
The EU upper limit for supplemental magnesium is 250 mg a day and the US figure is 350 mg, both based on loose stools rather than serious harm in people with healthy kidneys. Food magnesium does not count towards these limits, and the label's elemental magnesium figure is the one to add up.
Sources (9)
- Randomised controlled trial Russell IJ, Michalek JE, Flechas JD, Abraham GE. Treatment of fibromyalgia syndrome with Super Malic: a randomized, double blind, placebo controlled, crossover pilot study. J Rheumatol. 1995.
- Evidence summary Ferreira I, Ortigoza Á, Moore P. Magnesium and malic acid supplement for fibromyalgia. Medwave. 2019.
- Review Boulis M, Boulis M, Clauw D. Magnesium and Fibromyalgia: A Literature Review. J Prim Care Community Health. 2021.
- Systematic review Garrison SR, Korownyk CS, Kolber MR, et al. Magnesium for skeletal muscle cramps. Cochrane Database of Systematic Reviews. 2020.
- Regulator opinion EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS). Evaluation of di-magnesium malate, used as a novel food ingredient and as a source of magnesium in foods for the general population, food supplements, total diet replacement for weight control and food for special medical purposes. EFSA Journal. 2018.
- Regulator opinion Scientific Committee on Food, European Commission. Opinion of the Scientific Committee on Food on the Tolerable Upper Intake Level of Magnesium. 2001.
- Review Costello R, Rosanoff A, Nielsen F, West C. Perspective: Call for Re-evaluation of the Tolerable Upper Intake Level for Magnesium Supplementation in Adults. Advances in Nutrition. 2023.
- Animal study Uysal N, Kizildag S, Yuce Z, et al. Timeline (Bioavailability) of Magnesium Compounds in Hours: Which Magnesium Compound Works Best? Biol Trace Elem Res. 2019.
- Animal study Bertinato J, Plouffe LJ, Lavergne C, Ly C. Bioavailability of magnesium from inorganic and organic compounds is similar in rats fed a high phytic acid diet. Magnes Res. 2014.
Last reviewed 10 October 2026 · Next review April 2027 · How we rate evidence
Reader notes
Experiences and questions from readers, read by an editor before they appear. They are personal accounts, not evidence, and are not medical advice.