Magnesium Deficiency in Qatar: Signs, Causes & How to Fix It

Magnesium does not get the attention that vitamin D or iron do, but your body depends on it for more than 300 enzyme reactions — muscle contraction, nerve signalling, blood sugar control, blood pressure regulation, and building bone. It is also the mineral most people in Qatar are quietly short of without ever being tested for it.

At Bushra Pharmacy in Al Wukair, magnesium is one of the supplements customers ask about most, usually for one of three reasons: night-time leg cramps, poor sleep, or a doctor mentioning it alongside diabetes care. All three are worth understanding properly.

Why magnesium runs low in Qatar

You lose it through sweat. Magnesium is lost in perspiration. In a country where outdoor temperatures exceed 45°C for months and physical work continues through the summer, cumulative losses matter — particularly for outdoor workers, athletes, and anyone training in the afternoon heat.

Type 2 diabetes depletes it. This is the big one for Qatar. The 2023 national STEPwise survey put diabetes prevalence at 18.1% of adults — among the highest rates worldwide. Roughly 37% of people with type 2 diabetes have hypomagnesaemia. The relationship runs both ways: high blood sugar causes the kidneys to excrete more magnesium, and low magnesium worsens insulin resistance. A 2024 study found serum magnesium correlated negatively with HbA1c — the lower the magnesium, the worse the long-term glucose control.

Metformin can make it worse. Metformin — the most commonly prescribed diabetes medication — frequently causes diarrhoea, and diarrhoea impairs magnesium absorption in the intestine. If you take metformin and get cramps, it is worth raising magnesium with your doctor.

Modern diets are low in it. Magnesium comes from spinach, nuts, seeds, legumes and wholemeal bread. Diets built on refined flour, white rice and processed food deliver very little.

The signs worth noticing

Early magnesium deficiency is vague, which is exactly why it goes unrecognised:

• Muscle cramps and twitching — especially calf cramps at night, and eyelid twitching
• Poor sleep — difficulty falling asleep, or waking through the night
• Fatigue and weakness that rest does not resolve
• Headaches or migraines
• Irritability, low mood, or feeling "wired but tired"
• Palpitations — a fluttering or irregular heartbeat
• Constipation

Note how much this overlaps with iron deficiency and B12 deficiency. Fatigue alone tells you very little — which is why guessing between supplements is a poor strategy and a blood test is a good one.

The vitamin D connection most people miss

This explains a frustration we hear often at the counter: "I take vitamin D and my level still hasn't improved."

Vitamin D cannot be used by your body in the form you swallow. It has to be converted twice — once in the liver, once in the kidneys — and the enzymes that carry out both conversions require magnesium. If magnesium is low, that conversion is impaired, and vitamin D supplements underperform no matter how high the dose.

Given that vitamin D deficiency is widespread in Qatar despite year-round sunshine, and magnesium deficiency frequently sits alongside it, this pairing matters. If you have been supplementing vitamin D without improvement, low magnesium is a genuine candidate for why — worth discussing with your doctor before simply increasing the vitamin D dose.

How much you need

The NHS recommends 300 mg a day for men and 270 mg a day for women aged 19–64. Most people should aim to get this from food first.

For supplements, the NHS advises that 400 mg a day or less from supplements is unlikely to cause harm. Above that, the most common effect is diarrhoea — magnesium draws water into the bowel, which is precisely why some forms are sold as laxatives.

Food sources worth prioritising:

• Spinach and leafy greens — among the densest sources
• Almonds, cashews, pumpkin seeds — convenient and high in magnesium
• Legumes — lentils, chickpeas, beans — staples in local cooking
• Wholemeal bread and brown rice — refining strips most magnesium out
• Dark chocolate 70% or higher — genuinely a good source

Which form to choose — this matters more than the dose

Not all magnesium supplements behave the same way, and picking the wrong form is the most common mistake we see:

• Magnesium glycinate — bound to the amino acid glycine. Gentlest on the stomach and best absorbed. The right choice for sleep, cramps, anxiety, and for anyone who has had diarrhoea from other forms. This is what we recommend most often.
• Magnesium citrate — well absorbed, but has a mild laxative effect. A reasonable option if you also deal with constipation.
• Magnesium oxide — the cheapest and most widely sold, but poorly absorbed. Effective as a laxative or antacid; a weak choice for correcting a deficiency. If you bought magnesium and got diarrhoea with no benefit, this was probably the form.
• Combination products — Cal-Mag-Zinc and similar formulas are convenient for general bone and muscle support, but the magnesium dose per tablet is usually modest.

Timing: magnesium is often better taken in the evening, particularly if you are taking it for sleep or night cramps.

When to see a doctor rather than self-treat

Speak to a doctor rather than starting a supplement if you:

• have kidney disease — impaired kidneys cannot clear excess magnesium, and supplements can become dangerous
• have heart palpitations or an irregular heartbeat that is new
• take antibiotics (tetracyclines, quinolones), bisphosphonates for osteoporosis, or diuretics — magnesium interacts with all of these, and doses usually need separating by 2–4 hours
• have type 2 diabetes — worth asking for a magnesium level to be checked as part of routine bloods
• have severe or persistent symptoms

Our pharmacists can review what you are already taking and flag interactions before you start — that advice is free, whether or not you buy anything.

Where to get it in Qatar

We stock magnesium in the forms that actually make sense clinically, including magnesium glycinate for absorption and tolerability, standard magnesium tablets in 250 mg and 500 mg, and combination Cal-Mag-Zinc formulas.

Come into the Al Wukair branch and ask a pharmacist which form fits your situation, message us on WhatsApp +974 3990 0071, or order for delivery anywhere in Qatar through Snoonu, Rafeeq, or Talabat.

Browse our magnesium and mineral supplements.

The short version

Magnesium deficiency is common in Qatar and rarely tested for. Heat and sweat losses, a very high diabetes rate, metformin, and refined diets all push levels down. The signs — cramps, poor sleep, fatigue, headaches — are vague enough to be dismissed. If you supplement, glycinate is usually the best-tolerated and best-absorbed form, 400 mg a day or less from supplements is the safe ceiling, and if you have kidney disease or take interacting medication, ask first.

And if your vitamin D isn't budging despite supplementing — check your magnesium.

References

• NIH Office of Dietary Supplements — Magnesium: Fact Sheet for Health Professionals
• NHS — Vitamins and minerals: Others, including magnesium
• Harvard T.H. Chan School of Public Health — Magnesium, The Nutrition Source
• Unveiling the Role of Magnesium: Insights into Insulin Resistance and Glycemic Control in Type 2 Diabetes. EJIFCC, 2024
• Qatar's Progress in Curbing Diabetes: A Comprehensive and Proactive Approach. Health Systems & Reform, 2025
• World Health Organization — Diabetes