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What is elemental magnesium?
Elemental magnesium is the magnesium itself, measured apart from whatever it is bound to. It is not a product or a type; every supplement contains some. Its benefits are magnesium's authorised claims, and the elemental line is the dose.
- The mineral itselfwhat elemental means
- 14% to 60%how much of a compound is magnesium, by form
- 375mgthe UK reference value the elemental %NRV points at
- 300mgthe elemental figure a lifter's serving should hit
A label that prints it properly: Futuro Labs Magnesium Glycinate on Amazon UK, elemental magnesium 300mg per 2 capsules, 80% NRV, £19.99 for 180. Label breakdown. Finding the number on a label is walked through on the what type of magnesium is elemental page.
The definition, without the chemistry degree
Magnesium cannot be swallowed as bare metal, so every supplement delivers it bound to a partner: glycine in bisglycinate, citric acid in citrate, oxygen in oxide. The whole package has a weight, and the magnesium inside it has a smaller weight, and elemental magnesium is that smaller number, the mineral itself measured apart from its carrier. Ranade and Somberg's review of magnesium salts tabulates the shares: about 14% to 20% for bisglycinate depending on buffering, 16% for citrate, 15% for malate, 9% for taurate, 8% for threonate, 60% for oxide. Elemental magnesium is therefore not a type you can buy and not a brand; it is the measurement every type is honestly compared in.
Is elemental magnesium good for you? Reframing the question
The searches this page exists for ask whether elemental magnesium is good, what its benefits are, whether it is a good supplement. The honest reframe: elemental magnesium is the amount of the thing, so its benefits are magnesium's benefits, which in the UK means the authorised claims, normal muscle function, normal protein synthesis, normal energy-yielding metabolism, a reduction of tiredness and fatigue, electrolyte balance, normal functioning of the nervous system, normal psychological function, and the maintenance of normal bones and teeth. Those claims attach to any product delivering a significant amount, 15% of the 375mg reference value or more per serving, and they scale with reaching your reference intake, 300mg a day for men, 270mg for women, not with exotic carriers. So yes, elemental magnesium is good for you in exactly the way magnesium is, and a product advertising elemental magnesium is simply a product stating its dose properly.
| Job | How the elemental number does it | Worked example |
|---|---|---|
| State the dose | Elemental magnesium per serving, printed with %NRV | 300mg, 80% NRV, per 2 capsules |
| Expose the form | Compound weight times the percentage equals the elemental line | 1500mg bisglycinate at 20% is 300mg |
| Price fairly | Cost per day divided by hundreds of milligrams elemental | 22p a day over three hundreds is about 7p per 100mg |
The number in practice, and the worked example
Two bottles can both say 1500mg on the front and differ threefold in magnesium; the elemental line is the referee. A lifter's serving should read 300mg with 80% NRV, the supplement day should stay under the 400mg guidance level, and the fair price is about 7p per 100mg elemental. The worked example prints the whole chain: Futuro Labs Magnesium Glycinate, magnesium bisglycinate 1500mg at 20%, elemental magnesium 300mg, 80% NRV, per 2 vegan capsules, UK made under GMP and BRC, panels shown, £19.99 for 180 capsules, 22p a day. What is elemental magnesium, finally, is the one number on a magnesium label that cannot spin, which is why every page on this site is written in it.
What to check on the label
- Elemental magnesium is a measurement, not a type or product.
- The benefits are magnesium's authorised claims, reached by hitting the reference intake.
- Compound times percentage equals elemental: the maths any label must survive.
- 300mg at 80% NRV is the serving a lifter wants; 400mg is the supplement ceiling.
- Price in pence per 100mg elemental: about 7p is the benchmark.
The worked example: Futuro Labs Magnesium Glycinate
Futuro Labs Magnesium Glycinate prints the elemental chain end to end: 1500mg bisglycinate at 20%, elemental magnesium 300mg, 80% NRV, 2 capsules, 22p a day from a £19.99 bottle of 180. Vegan, UK made, panels shown.
- Elemental magnesium per serving
- 300mg (80% NRV)
- Form
- magnesium bisglycinate 20%
- Serving
- 2 capsules a day
- Bottle
- 180 capsules, 90 days
- Price
- £19.99 (22p a day)
- Capsule
- vegetarian shell, vegan product
Questions people also ask
Is elemental magnesium a good supplement?
It is not a supplement; it is the measured magnesium inside any supplement. A good product is one that prints a full elemental dose, around 300mg per serving.
What are the benefits of elemental magnesium for the body?
Magnesium's authorised claims: normal muscle function, protein synthesis, energy metabolism, reduced tiredness and fatigue, electrolyte balance, nervous system and psychological function, and normal bones and teeth.
How much elemental magnesium should I take?
300mg a day from a supplement for someone training on a narrow diet, under the UK's 400mg supplement guidance level.
Why do labels hide the elemental magnesium?
Because compound weights are bigger numbers. UK panels should show the nutrient per serving; if the elemental line is missing, assume the front figure is compound.
What does 20% mean after magnesium bisglycinate?
That the material is 20% magnesium by weight, so 1500mg of it contains the 300mg elemental the panel states. It is the maths check on any glycinate label.
Sources
- Futuro Labs Magnesium Glycinate listing, Amazon UK, label and price checked 31 August 2026. https://www.amazon.co.uk/dp/B0BT7Z5VQW
- Ranade VV, Somberg JC. Bioavailability and pharmacokinetics of magnesium after administration of magnesium salts to humans. American Journal of Therapeutics 2001;8(5):345-357. PubMed record
- Retained Regulation (EU) No 1169/2011, Annex XIII: nutrient reference value for magnesium 375mg. https://www.legislation.gov.uk/eur/2011/1169/annex/XIII
- Department of Health. Dietary Reference Values for Food Energy and Nutrients for the United Kingdom. Report on Health and Social Subjects 41, 1991 (magnesium RNI 300mg men, 270mg women).
- Expert Group on Vitamins and Minerals. Safe Upper Levels for Vitamins and Minerals. Food Standards Agency, 2003 (magnesium guidance level 400mg a day from supplements). https://cot.food.gov.uk/sites/default/files/vitmin2003.pdf
- EFSA Panel on Dietetic Products, Nutrition and Allergies. Scientific Opinion on the substantiation of health claims related to magnesium. EFSA Journal 2010;8(10):1807. https://efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2010.1807