You sleep enough — and still wake up drained
Magnesium is involved in over 600 biochemical processes in the body, including those that produce energy. Most people take in less than recommended — and the best-selling form is poorly absorbed.
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- 30-day supply
- Highly absorbable formula
- Made in Bulgaria
- Free delivery with card payment
What this looks like in practice
You wake up tired even though you slept enough. You wake around three at night and toss and turn from then on.
Your eyelid twitches for days for no reason. You get calf cramps at night. At four in the afternoon your concentration drops and you reach for a third coffee.
Each of these has more than one possible cause. Magnesium is one of them — and among the easiest to correct.
Why a lack of it feels exactly like fatigue
Energy
ATP — the molecule that carries energy in every cell — is biologically active only when bound to magnesium, as the Mg-ATP complex. Without magnesium the molecule exists, but does no work. That's why magnesium doesn't act as a stimulant; it's the condition for energy to be used at all.
Nerves and muscles
Magnesium modulates calcium entry into cells and blocks the NMDA receptor at rest. This is behind muscle relaxation. When levels drop far enough, cramps, tremor and twitching appear.
Blood sugar
Magnesium is a cofactor for the insulin receptor. The link works both ways — low magnesium worsens insulin sensitivity, and high blood sugar increases magnesium loss through the kidneys.
Magnesium contributes to normal energy-yielding metabolism, to normal functioning of the nervous system and to normal muscle function.
The problem is on both sides — how much comes in and how much goes out
People over 60 · insulin resistance or type 2 diabetes · long-term PPI or diuretic use · people who exercise · diets under 1,500 kcal · regular alcohol use
“But my tests are fine”
This confuses most people, including colleagues.
Less than 1% of the body's magnesium is in the blood. Half to 60% is in the bones, the rest is inside the cells.
The kidney is the main regulator: when intake drops, reabsorption increases and urinary excretion falls almost to zero. Bone serves as a slow reserve. The result is that the serum value stays normal long after stores have started to fall.
A normal serum magnesium doesn't rule out a shortfall.
With magnesium there's no convenient test that settles the question. You judge by intake, risk factors and how you feel after a few weeks.
Why one big tablet a day is the wrong approach
Magnesium is absorbed in the small intestine by two routes: a saturable one, through the TRPM6 and TRPM7 channels, and a passive one, between the cells.
The consequence matters: the bigger the single dose, the smaller the percentage absorbed. The excess stays in the gut, holds water and loosens stools.
The form decides how much reaches you
| Form | Where you find it | Tolerability |
|---|---|---|
| Oxide | the cheapest in the pharmacy | low solubility, often loosens stools |
| Citrate | mid-range | good absorption, loosens stools at high doses |
| Bisglycinate | premium | well tolerated, rarely loosens stools |
| Malate | premium | well tolerated |
| Sulphate / chloride | Epsom salt | strongly laxative |
Why oxide is everywhere. It contains a lot of magnesium per gram and costs almost nothing. But its solubility is low and the absorbed part is small — so much so that magnesium oxide is also used as a laxative. That's a recognised use, not a side effect.
How to read a label. The front often shows the weight of the compound — a big number. The value that means something is in the table on the back, on the “Magnesium” line. Divide it by the recommended daily dose and compare that.
Four ingredients and why each one is there
Magnesium bisglycinate
Magnesium bound to two glycine molecules. The chelate bond makes it stable in the stomach and it rarely loosens stools. Glycine is an inhibitory amino acid in the central nervous system. Contributes to normal functioning of the nervous system and normal psychological function.
Magnesium malate
Bound to malic acid — an intermediate in the Krebs cycle, i.e. in the cell's own energy cycle. Contributes to normal energy-yielding metabolism and the reduction of tiredness and fatigue.
Taurine
A sulphonic amino acid that the body makes itself and that you get from food. It is most concentrated in the heart muscle, skeletal muscles and the retina.
Vitamin B6 (P5P)
Involved in over a hundred enzyme reactions, including neurotransmitter synthesis. Contributes to the reduction of tiredness and fatigue, normal functioning of the nervous system and the regulation of hormonal activity.
90 capsules · 3 capsules a day · 30 days · 300 mg elemental magnesium per daily dose · 6 mg vitamin B6 (P5P)
MAG CORE vs. typical magnesium
| Criterion | MAG CORE | Typical magnesium |
|---|---|---|
| Form | bisglycinate + malate | oxide |
| Tolerability | rarely loosens stools | often loosens stools |
| Dose split | 3 servings | 1 tablet |
| Taurine | yes | no |
| Vitamin B6 (P5P) | yes | rarely |
| Production | Bulgaria | often unspecified |
How to take it
Dose
Three capsules a day, with food.
Split them
One with each of three meals is absorbed better than three at once. If that's not practical — then with dinner.
Caution
Do not exceed the recommended dose without consulting a doctor.
When magnesium gets in the way of your medication
Magnesium forms complexes with a number of medicines in the gastrointestinal tract and reduces their absorption. The solution is spacing them out, not stopping.
If you take something that isn't listed here, ask your doctor or pharmacist.
When you'll know if it's working for you
Stores are replenished over weeks, not hours. Anyone who promises you an effect from the first night is selling something else.
If it has an effect for you, it comes between the second and sixth week. That's why one box is 30 days, not 10.
Make it measurable: pick one marker and track it for a month — how you wake up, night cramps or afternoon concentration. One, not five.
When you shouldn't take it
The form and dose were chosen by a doctor
NOBS, made in Bulgaria. Dr. Mohamed Mehmedov, a doctor specialising in endocrinology and metabolic diseases, is a partner in the company and was involved in choosing the form and dose.
MAG CORE doesn't sell a secret biological pathway. The logic is formulation: two magnesium forms, a clear elemental dose, taurine and vitamin B6 (P5P) — chosen for absorption and tolerability, not for a big number on the front of the label.
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“The pharmacy has magnesium for 8 euros”
It does. It's magnesium oxide.
You pay less and get a low-solubility form packed into one tablet, which is absorbed in a small percentage and often loosens stools. The price per dose looks low until you work out how much of it actually reaches you.
MAG CORE costs more because bisglycinate and malate cost more to produce and because the dose is split into three servings.
If you're looking for the cheapest magnesium, pharmacy oxide is cheaper. If you're looking for magnesium you'll take for three months without upsetting your stomach — that's the difference you pay for.
The questions worth asking
Will it loosen my stools?
With bisglycinate and malate it's much less likely than with oxide. If you get an upset stomach, drop to two capsules for a few days and then add the third back.
Morning or evening?
With food, ideally split through the day. If you pick one moment — with dinner.
Can I take it with other supplements?
Yes, except iron and the medicines in the interactions section.
If I take more, will it work faster?
No. Absorption is saturable — a bigger single dose is absorbed in a smaller percentage. More means loose stools sooner, not faster results.
Should I get tested first?
Serum magnesium rarely gives an answer. If you're looking for the cause of your fatigue, TSH and free T4, ferritin, vitamin B12, vitamin D and blood sugar with insulin are more informative.
Can I take it long-term?
Yes. If your dietary intake is persistently insufficient, intake is long-term. With kidney disease — see the contraindications.
Why capsules and not powder?
So the dose can be split precisely, with no sweeteners or flavourings in the formula.
What's the difference between the options?
You can choose one pack or a bundle of three packs according to the current offer in the store.
Three capsules a day, thirty days, one marker
I'm not promising you that magnesium will solve your fatigue. I'm promising you a form the body tolerates, a dose that's split the right way and a label you can check. The rest you'll see after a month.
Order MAG CORE →30-day supply · Free delivery with card payment · Cash on delivery: €4
Food supplement. Not a substitute for a varied diet and a healthy lifestyle. Do not exceed the recommended daily dose. Keep out of reach of young children. It is not a medicine and does not cure diseases. If you are pregnant, breastfeeding, have kidney disease or take medication, consult a doctor. The information on this page is educational and does not replace a medical consultation.