Magnesium in the UAE: Which Form and How Much

By NUDAY Editorial · Reviewed by NUDAY Research Team · Last updated October 2026

The best magnesium in the UAE is glycinate or citrate at a sensible dose, not oxide. Form decides how much you actually absorb, so two products printing the same milligram figure can deliver very different amounts. Most supplements sold here use oxide because it is cheap.

Already in your hydration. Every NUDAY Hydration Stick carries 120 mg of magnesium alongside 600 mg sodium, 200 mg potassium and 100 mg calcium, which is roughly double what a typical electrolyte sachet contains.

Why does the form of magnesium matter so much?

Because the number on the front of the box is the amount of elemental magnesium in the tablet, not the amount that reaches your bloodstream. Those are very different things, and the gap between them is decided by which magnesium salt the manufacturer used.

Firoz and Graber compared commercial magnesium preparations in 2001 in Magnesium Research and found magnesium oxide was poorly absorbed compared with better forms. Walker and colleagues reached a similar conclusion in 2003, also in Magnesium Research, comparing citrate against oxide. Oxide persists because it is cheap and because it carries a high percentage of elemental magnesium by weight, which lets a brand print a big number on a small tablet.

So when a label says "magnesium 400 mg" and does not say which form, assume oxide, and assume you are absorbing a fraction of it.

Which form should you actually buy?

Six forms cover almost everything on UAE shelves.

Form	Absorption	Best for	Watch out for
Glycinate (bisglycinate)	High	Daily use, evenings, sensitive stomachs	Costs more; bulky, so tablets are larger
Citrate	High	Daily use, people who also want regularity	Mildly laxative at higher doses
Malate	Good	Daytime use	Less researched than the two above
Chloride	Moderate	General use	Can taste unpleasant in powders
Threonate	Good	Marketed for cognition	Expensive; human evidence is still thin
Oxide	Poor	Cheap bulk, or short-term constipation relief	The default in budget supplements. Most of it passes through

If a product does not name its form anywhere on the label or the listing, that silence is the answer.

How much magnesium do you actually need?

Adult reference intakes sit at roughly 310 to 420 mg a day depending on age and sex, and food should do most of the work. Nuts, seeds, legumes, wholegrains and dark leafy greens are the main sources, and a diet heavy on refined carbohydrates and light on all of those is the usual reason someone falls short.

A supplement is there to close a gap. Taking 400 mg on top of an already adequate diet mostly produces expensive urine, and supplemental doses above roughly 350 mg a day commonly cause loose stools. More is not better with this mineral.

Do you lose magnesium in sweat?

Yes, but keep it in proportion. Sodium is the mineral you lose in overwhelming quantity, at roughly 500 to 1,500 mg per litre of sweat. Magnesium losses are far smaller.

What makes it relevant here is duration rather than intensity. Someone training through a Gulf summer is sweating heavily for six or seven months of the year, and small repeated losses stacked on a diet that was already short add up in a way a single session never would. That is the argument for having magnesium in your daily electrolyte rather than treating it as a separate purchase, and it is why we built it into the stick. The wider case is in best hydration in the UAE and Dubai.

Does magnesium help you sleep?

Possibly, modestly, and mostly if you were short to begin with. This is the claim the category leans on hardest and the evidence is thinner than the packaging suggests.

Abbasi and colleagues reported improvements in insomnia measures in older adults in a small 2012 trial in the Journal of Research in Medical Sciences. It is frequently cited precisely because there is not much else. Magnesium is genuinely involved in nervous system regulation, so the mechanism is plausible, but plausible is not proven. If you sleep badly because you look at a screen until 1am, magnesium will not fix that. If you are tired for reasons you cannot place, why am I always tired covers the more common causes.

Does magnesium stop cramps?

Probably not, and we would rather say so than sell you something on a claim that does not hold.

A 2020 Cochrane review led by Garrison examined magnesium for muscle cramps and found no meaningful benefit for idiopathic cramps in older adults, with limited evidence elsewhere. Exercise-associated cramping is more closely tied to fatigue, neuromuscular factors and heavy sodium loss than to magnesium status. If you cramp in Gulf heat, sodium is the far more productive lever, which is what we cover in sore muscles after a workout.

Magnesium earns its place in a formula because replacing what you lose is sound. It does not earn a cramp claim.

Do you need a separate magnesium supplement?

Most people here do not, and this is where we will argue against an extra purchase.

If you eat reasonably and already take a daily electrolyte with real magnesium in it, you are covered. A separate 400 mg tablet on top is usually redundant, and if that tablet is oxide it was doing very little anyway. A standalone supplement makes sense in three cases: a diagnosed deficiency, a diet genuinely low in nuts, seeds, legumes and greens, or a doctor telling you to take one.

NUDAY does not sell a standalone magnesium product. We put a meaningful dose into the thing you already drink daily, because that is the version people actually keep up. For the wider local picture, see the complete guide to supplements in the UAE and the electrolyte buyer's guide.

Who should be careful?

• Anyone with reduced kidney function. Your kidneys clear excess magnesium. If they are impaired, supplemental magnesium can accumulate. Speak to your doctor first.
• Anyone on certain medications. Magnesium can interfere with the absorption of some antibiotics and other drugs. Separating doses by a few hours usually solves it, but check.
• Anyone chasing a high dose. Past roughly 350 mg a day from supplements, the common result is digestive upset rather than better sleep.

The bottom line

Two checks settle almost every magnesium purchase in this market. Does the label name the form, and is that form glycinate or citrate rather than oxide. Get those right and the dose question is straightforward, because you are topping up a diet rather than replacing one. Be sceptical of the sleep claims and ignore the cramp claims. And before buying a separate tablet, check what is already in your daily electrolyte, because in a NUDAY stick it is 120 mg.

Frequently Asked Questions

Which magnesium is best to buy in the UAE?

Magnesium glycinate or citrate for most people. Glycinate is gentle on the stomach and the usual choice for evening use, citrate is well absorbed and mildly laxative, and oxide is the cheap filler form that is poorly absorbed. Check which form a label states, because the milligram figure alone tells you very little.

Is magnesium oxide bad?

Not harmful, just inefficient. Firoz and Graber compared commercial preparations in 2001 in Magnesium Research and found oxide was poorly absorbed relative to better forms, and Walker and colleagues reported similar in 2003. It is used because it is cheap and packs a high elemental percentage into a small tablet.

How much magnesium do you need a day?

Adult reference intakes sit at roughly 310 to 420 mg a day depending on age and sex, and most of that should come from food. A supplement is there to close a gap, not to replace it. Doses above about 350 mg a day from supplements commonly cause loose stools.

Do you lose magnesium through sweat?

Yes, though far less than sodium. Sweat magnesium concentrations are small, so a single session barely registers, but months of heavy sweating in Gulf heat alongside a diet already low in magnesium makes replacement worth building into a routine rather than ignoring.

Does magnesium actually help with sleep and cramps?

The evidence is thinner than the marketing suggests. Small trials such as Abbasi and colleagues in 2012 found modest sleep improvements in older adults with insomnia, but larger evidence is limited. For cramps, a 2020 Cochrane review by Garrison and colleagues found no meaningful benefit for idiopathic cramps. Replacing a shortfall is reasonable; expecting a cure is not.