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What is the role of magnesium in the body?
Magnesium is a mineral that the body does not produce itself: it all comes from food, drinking water, and, if necessary, a supplement. It is involved in a very large number of enzymatic reactions, starting with those involving ATP.
The authorized European claims summarize its scope of action: it contributes to normal energy metabolism, normal functioning of the nervous system, normal muscle function, electrolyte balance, normal psychological functions, and the reduction of fatigue. These formulations are cautious, and this is the only honest vocabulary: a magnesium supplement is not a medicine.
ANSES sets the adequate intake for adults at approximately 380 mg per day for men and 300 mg for women; the European reference value on labels is 375 mg. If your diet already covers most of this, a supplement will not add much.
Bisglycinate, citrate, malate, marine or oxide: which form to choose?
The answer is more clear-cut than the shelf suggests. Two parameters matter, and they vary in opposite directions: the elemental magnesium content of the salt, meaning the amount of actual magnesium per capsule, and its solubility, which determines absorption and digestive tolerance.
Magnesium Bisglycinate
Magnesium is chelated here to two glycine molecules, an amino acid. It is the most digestively tolerated form, and the one we first recommend to those who have experienced intestinal discomfort with other forms. Its elemental content is low, from 10 to 16%: a label stating "500 mg of bisglycinate" does not deliver 500 mg of magnesium, but often less than 80 mg. Check the line "of which magnesium." "Magnesium glycinate," "glycinate de magnésium," and "bisglycinate" refer to the same family.
Citrate, Malate, and Chloride
Three very soluble and well-absorbed salts. Citrate, with around 16% elemental magnesium, offers the best assimilation/price ratio; its slightly laxative effect at high doses is real but not comparable to that of oxide, and it disappears when doses are split. Malate combines the mineral with malic acid, an intermediate in the cellular energy cycle: this argument appeals to athletes, although no superiority in performance can be claimed. Chloride is very bitter and distinctly laxative, rarely suitable for long-term use.
Magnesium oxide
Oxide is the most concentrated salt, around 60% elemental magnesium: spectacular dosages in a small capsule, and negligible cost. However, it is very poorly soluble, and a large part of the magnesium remains in the intestine, attracting water by osmosis and accelerating transit. Oxide and hydroxide are also used as laxatives in pharmacies, which says it all. If a supplement has given you loose stools, check its ingredient list.
What about "marine magnesium"?
It is extracted from seawater, and that's pretty much all the descriptor means. Chemically, it's essentially a mixture of magnesium oxide and hydroxide, with traces of chloride and sulfate. The most sold product under a natural appellation is therefore composed of the least soluble and least tolerated forms available. The marine origin changes neither the bioavailability nor the effect on transit: it is not dangerous and costs little, but it deserves neither its price premium nor its reputation. One rule suffices, here as elsewhere: compare the elemental magnesium per serving, never the weight of the salt displayed on the container.
What foods are rich in magnesium?
According to the ANSES Ciqual composition table, the highest levels per 100g are found in seeds and nuts: pumpkin seeds exceed 500mg, Brazil nuts approach 370mg, almonds are around 270mg, and cashews around 250mg. Next come raw buckwheat (approx. 230mg), 70% dark chocolate (approx. 200mg), dried white beans (approx. 180mg), then cooked green vegetables, spinach around 80mg.
These values are for 100g, and no one eats 100g of almonds: a handful of 30g provides about 80mg, roughly one-fifth of an adult man's adequate intake. Water also counts, with the richest mineral waters exceeding 100mg per liter. The refining of cereals, which removes the bran and germ where magnesium is concentrated, explains a good part of modern depletion: our oat flour and plant protein sections go in the opposite direction.
How to recognize an insufficient intake?
The signs commonly associated with low intake — persistent fatigue, cramps, eyelid twitching, irritability, restless sleep — are real but completely non-specific: they also accompany lack of sleep, dehydration, overwork, anemia, or a thyroid disorder. None of these allow for a conclusion of magnesium deficiency, and a standard blood test poorly reflects the body's reserves. If these signs appear or worsen, consult a doctor rather than buying a supplement.
Why do athletes lose more of it?
Three mechanisms combine. Sweat contains magnesium, which a long session or high heat evacuates just like sodium and potassium: this is the role of electrolytes during exercise. Intense exercise also increases urinary excretion in the hours that follow. Finally, needs follow energy expenditure, as ATP production mobilizes magnesium-dependent enzymatic systems.
However, supplementation will not increase your lifts: it secures an adequate intake, without improving the performance of an athlete whose needs are already met. The priority remains training, protein intake—see our proteins—and creatine monohydrate, which is better established for strength.
Why is magnesium associated with vitamin B6 and taurine?
Vitamin B6 is the most common association, and its authorized claims overlap with those of magnesium: it contributes to reducing fatigue, normal functioning of the nervous system, and normal energy metabolism. This is the solid reason for the association. The idea that B6 "helps magnesium enter" the cell is widely circulated in commercial contexts, but we cannot support it with any ANSES or EFSA source.
Taurinate combines the mineral with taurine, a sulfur-containing amino acid abundant in muscle and the nervous system. The reasoning is consistent, but no superiority of taurinate over bisglycinate or citrate is established in official guidelines: it is a suitable form, not a superior one. ZMA goes further by combining zinc, magnesium, and vitamin B6 in a single evening dose; for broad coverage, our multivitamins are often more relevant.
What dose, when, for how long?
Always think in terms of elemental magnesium. A typical supplement dose is between 100 and 300 mg per day. EFSA sets a safety limit of 250 mg per day for magnesium from supplements and waters in the form of easily dissociable salts, including oxide; this does not apply to magnesium from food, and there is no demonstrated benefit to exceeding this limit.
Split the dose. Two doses of 100 to 150 mg, morning and evening, are better absorbed and much better tolerated than a single dose of 300 mg — the most effective way to prevent loose stools, even before changing the form.
Take it with a meal, which slows down transit and limits the osmotic effect. Evening is the most common time for the main dose; if your goal is sleep initiation, consider our melatonin section, and a doctor if the problem persists.
Count in weeks. Magnesium does not have a noticeable acute effect: a course of one to three months is the usual format. Space magnesium at least two hours apart from iron or zinc, as these minerals compete for absorption.
What precautions should be known?
The main contraindication is kidney failure: the kidneys eliminate magnesium, and when they function poorly, magnesium accumulates, leading to a risk of hypermagnesemia. Any supplementation is then contraindicated without explicit medical advice.
Magnesium also interferes with the absorption of certain antibiotics (tetracyclines, quinolones) and bisphosphonates: the usual rule is a several-hour delay, but it's up to your doctor or pharmacist to decide. Pregnancy, breastfeeding, diuretic treatment, or long-term stomach treatment: seek advice before starting. The most common side effect remains digestive, almost always related to too high a dose at once or an oxide form. Food supplements do not replace a varied diet and a healthy lifestyle.
Frequently Asked Questions
How long does it take for magnesium to take effect?
In weeks, not days, and with no perceptible effect immediately after taking it. Magnesium is neither a stimulant nor a sedative: nothing happens in the hour that follows, and expecting a strong feeling after three days mainly leads to overdosing. The usual course format is one to three months. If you are looking for an immediate effect on sleep or fatigue, you will be disappointed — and these symptoms, if they persist, should be evaluated by a medical professional rather than treated with a supplement.
What are the signs of magnesium deficiency?
Persistent fatigue, cramps, eyelid twitching, irritability, restless sleep: these are the commonly cited signs, and they are real. The problem is that they are non-specific. Lack of sleep, dehydration, overwork, anemia, or a thyroid disorder present exactly the same picture. None of these signs allow for a definitive conclusion, and standard blood tests do not accurately reflect the body's reserves. If these symptoms persist, consult a doctor rather than taking multiple supplements.
What causes magnesium deficiency?
Most often, a diet poor in magnesium-containing foods: the refining of cereals removes the bran and germ, where magnesium is concentrated. Added to this are increased losses—heavy sweating, intense exercise, certain diuretic or long-term stomach treatments—and situations where needs increase. Malabsorption or kidney disease can also be causes and should then be managed by a doctor.
What is the richest food in magnesium?
Pumpkin seeds, with over 500 mg per 100 g according to the ANSES Ciqual table. Followed by Brazil nuts (around 370 mg), almonds (270 mg), cashews (250 mg), raw buckwheat (230 mg), 70% dark chocolate (200 mg) and dried white beans (180 mg). Pay attention to the scale: these values are for 100 g, and a 30 g handful of almonds provides only about 80 mg. Mineral water also counts, with the richest exceeding 100 mg per liter.
Is it dangerous to take too much magnesium?
In adults with normally functioning kidneys, excess magnesium primarily results in loose stools or diarrhea: unabsorbed magnesium remains in the intestine and attracts water there. This is unpleasant but not dangerous, and it stops when the dose is reduced. EFSA sets a safety limit of 250 mg per day for magnesium from supplements, with magnesium from food not being subject to this limit. The real risk situation is kidney failure: the kidney can no longer properly eliminate the mineral, which then accumulates. In this case, no supplementation should be undertaken without explicit medical advice.
What is the best magnesium?
Bisglycinate for digestive tolerance, citrate or malate for quality/price ratio. Oxide and marine magnesium are the least well assimilated, despite high advertised dosages. The sorting criterion remains the same regardless of the brand: the "of which magnesium" line on the label, relative to the number of capsules to be taken.
Which magnesium to choose in a pharmacy?
The same criteria apply as elsewhere: the counter does not change the chemistry of the salt. Many products sold in pharmacies are based on oxide, hydroxide, or marine magnesium, which are the least soluble forms—hence the loose stools often reported. Turn the box over and look for the "of which magnesium" line and the name of the salt. A properly dosed bisglycinate or citrate is better than an oxide with a spectacular dosage. If you are on medication, the question to ask the pharmacist is less about the brand than about the timing of doses.
When to take magnesium, morning or evening?
Both are suitable: no optimal time has been demonstrated. What matters more is taking it with a meal and splitting the dose, for example, 100 to 150 mg in the morning and the same in the evening — better absorbed and much better tolerated than a single dose. Many people take their main dose in the evening, more out of habit than necessity. Do not expect a sedative effect: contributing to the normal functioning of the nervous system does not mean inducing sleep. A persistent sleep disorder should be addressed by a doctor.
How much magnesium per day?
Approximately 380 mg for adult men and 300 mg for women according to ANSES, including dietary intake. As a supplement, 100 to 300 mg of elemental magnesium covers most situations, within the 250 mg limit set by EFSA.
Which magnesium to take for cramps?
Magnesium contributes to normal muscle function, which explains the common association with cramps; this claim does not mean that a supplement will make a cramp disappear. If you simply want to secure your intake, choose a well-tolerated form—bisglycinate, citrate, or malate—rather than an oxide. For athletes, cramps are often also due to hydration, sodium, and accumulated fatigue: see our electrolytes. Frequent, nocturnal, or painful cramps should be examined by a doctor: their causes are numerous and often unrelated to magnesium.
What are the side effects of magnesium?
The most common are digestive: loose stools, diarrhea, bloating. This is almost always a matter of form and dose—oxide, hydroxide, and chloride are the most implicated, and a high single dose exacerbates the phenomenon. Switching to bisglycinate, splitting into two doses, and taking it with meals resolves most cases. Beyond that, accumulation can occur in cases of kidney failure, a situation that contraindicates any supplementation without medical advice. If discomfort persists despite these adjustments, stop and talk to your doctor or pharmacist.
Does magnesium cause weight gain?
No. Magnesium does not provide calories, and nothing attributes any effect on weight, in either direction, to it. The inverse question comes up just as often: a magnesium "for weight loss" does not exist, and no European claim supports this. A weight change or a feeling of water retention is very rarely explained by a mineral supplement. For body composition goals, diet and training are the deciding factors—see our weight loss section.
Can magnesium be taken with ongoing treatment?
This question should be addressed to your doctor or pharmacist, not a sales website: only they know your treatment, its dosage, and your medical history. What we can say without risk: magnesium is known to interfere with the absorption of several medications taken at the same time, particularly thyroid hormones, certain antibiotics, and bisphosphonates, which usually leads to spacing out doses by several hours. This spacing should not be improvised. Never modify a treatment on your own initiative and seek advice before starting supplementation.
Can magnesium and vitamin D be combined?
Yes, with no absorption problems: these are two distinct nutrients and there is no need to separate them during the day. They are often found together in autumn and winter routines. However, space magnesium apart from iron or zinc, as these minerals compete for absorption. See our vitamin D and omega 3 sections.
What magnesium brands do we offer?
Our selection prioritizes truly absorbable forms and labels that display elemental magnesium: Nutriting for a French bisglycinate with transparent dosages, IO.Genix for Albion® chelated bisglycinate and citrate, Now Foods for associated trace elements. All are part of our sports nutrition section.
Where can I find magnesium near Montpellier?
Our Vendargues store, about ten minutes from Montpellier, offers something that no product description can replace: turning over two containers and comparing the "of which magnesium" line. This is often where the difference between a bisglycinate and marine magnesium becomes evident. We also ship everywhere in France and Europe.
Sources: ANSES for nutritional references, Ciqual for food content, EFSA for the safety limit and authorized claims.
To learn more: our article on magnesium bisglycinate.
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What is the role of magnesium in the body?
Magnesium is a mineral that the body does not produce itself: it all comes from food, drinking water, and, if necessary, a supplement. It is involved in a very large number of enzymatic reactions, starting with those involving ATP.
The authorized European claims summarize its scope of action: it contributes to normal energy metabolism, normal functioning of the nervous system, normal muscle function, electrolyte balance, normal psychological functions, and the reduction of fatigue. These formulations are cautious, and this is the only honest vocabulary: a magnesium supplement is not a medicine.
ANSES sets the adequate intake for adults at approximately 380 mg per day for men and 300 mg for women; the European reference value on labels is 375 mg. If your diet already covers most of this, a supplement will not add much.
Bisglycinate, citrate, malate, marine or oxide: which form to choose?
The answer is more clear-cut than the shelf suggests. Two parameters matter, and they vary in opposite directions: the elemental magnesium content of the salt, meaning the amount of actual magnesium per capsule, and its solubility, which determines absorption and digestive tolerance.
Magnesium Bisglycinate
Magnesium is chelated here to two glycine molecules, an amino acid. It is the most digestively tolerated form, and the one we first recommend to those who have experienced intestinal discomfort with other forms. Its elemental content is low, from 10 to 16%: a label stating "500 mg of bisglycinate" does not deliver 500 mg of magnesium, but often less than 80 mg. Check the line "of which magnesium." "Magnesium glycinate," "glycinate de magnésium," and "bisglycinate" refer to the same family.
Citrate, Malate, and Chloride
Three very soluble and well-absorbed salts. Citrate, with around 16% elemental magnesium, offers the best assimilation/price ratio; its slightly laxative effect at high doses is real but not comparable to that of oxide, and it disappears when doses are split. Malate combines the mineral with malic acid, an intermediate in the cellular energy cycle: this argument appeals to athletes, although no superiority in performance can be claimed. Chloride is very bitter and distinctly laxative, rarely suitable for long-term use.
Magnesium oxide
Oxide is the most concentrated salt, around 60% elemental magnesium: spectacular dosages in a small capsule, and negligible cost. However, it is very poorly soluble, and a large part of the magnesium remains in the intestine, attracting water by osmosis and accelerating transit. Oxide and hydroxide are also used as laxatives in pharmacies, which says it all. If a supplement has given you loose stools, check its ingredient list.
What about "marine magnesium"?
It is extracted from seawater, and that's pretty much all the descriptor means. Chemically, it's essentially a mixture of magnesium oxide and hydroxide, with traces of chloride and sulfate. The most sold product under a natural appellation is therefore composed of the least soluble and least tolerated forms available. The marine origin changes neither the bioavailability nor the effect on transit: it is not dangerous and costs little, but it deserves neither its price premium nor its reputation. One rule suffices, here as elsewhere: compare the elemental magnesium per serving, never the weight of the salt displayed on the container.
What foods are rich in magnesium?
According to the ANSES Ciqual composition table, the highest levels per 100g are found in seeds and nuts: pumpkin seeds exceed 500mg, Brazil nuts approach 370mg, almonds are around 270mg, and cashews around 250mg. Next come raw buckwheat (approx. 230mg), 70% dark chocolate (approx. 200mg), dried white beans (approx. 180mg), then cooked green vegetables, spinach around 80mg.
These values are for 100g, and no one eats 100g of almonds: a handful of 30g provides about 80mg, roughly one-fifth of an adult man's adequate intake. Water also counts, with the richest mineral waters exceeding 100mg per liter. The refining of cereals, which removes the bran and germ where magnesium is concentrated, explains a good part of modern depletion: our oat flour and plant protein sections go in the opposite direction.
How to recognize an insufficient intake?
The signs commonly associated with low intake — persistent fatigue, cramps, eyelid twitching, irritability, restless sleep — are real but completely non-specific: they also accompany lack of sleep, dehydration, overwork, anemia, or a thyroid disorder. None of these allow for a conclusion of magnesium deficiency, and a standard blood test poorly reflects the body's reserves. If these signs appear or worsen, consult a doctor rather than buying a supplement.
Why do athletes lose more of it?
Three mechanisms combine. Sweat contains magnesium, which a long session or high heat evacuates just like sodium and potassium: this is the role of electrolytes during exercise. Intense exercise also increases urinary excretion in the hours that follow. Finally, needs follow energy expenditure, as ATP production mobilizes magnesium-dependent enzymatic systems.
However, supplementation will not increase your lifts: it secures an adequate intake, without improving the performance of an athlete whose needs are already met. The priority remains training, protein intake—see our proteins—and creatine monohydrate, which is better established for strength.
Why is magnesium associated with vitamin B6 and taurine?
Vitamin B6 is the most common association, and its authorized claims overlap with those of magnesium: it contributes to reducing fatigue, normal functioning of the nervous system, and normal energy metabolism. This is the solid reason for the association. The idea that B6 "helps magnesium enter" the cell is widely circulated in commercial contexts, but we cannot support it with any ANSES or EFSA source.
Taurinate combines the mineral with taurine, a sulfur-containing amino acid abundant in muscle and the nervous system. The reasoning is consistent, but no superiority of taurinate over bisglycinate or citrate is established in official guidelines: it is a suitable form, not a superior one. ZMA goes further by combining zinc, magnesium, and vitamin B6 in a single evening dose; for broad coverage, our multivitamins are often more relevant.
What dose, when, for how long?
Always think in terms of elemental magnesium. A typical supplement dose is between 100 and 300 mg per day. EFSA sets a safety limit of 250 mg per day for magnesium from supplements and waters in the form of easily dissociable salts, including oxide; this does not apply to magnesium from food, and there is no demonstrated benefit to exceeding this limit.
Split the dose. Two doses of 100 to 150 mg, morning and evening, are better absorbed and much better tolerated than a single dose of 300 mg — the most effective way to prevent loose stools, even before changing the form.
Take it with a meal, which slows down transit and limits the osmotic effect. Evening is the most common time for the main dose; if your goal is sleep initiation, consider our melatonin section, and a doctor if the problem persists.
Count in weeks. Magnesium does not have a noticeable acute effect: a course of one to three months is the usual format. Space magnesium at least two hours apart from iron or zinc, as these minerals compete for absorption.
What precautions should be known?
The main contraindication is kidney failure: the kidneys eliminate magnesium, and when they function poorly, magnesium accumulates, leading to a risk of hypermagnesemia. Any supplementation is then contraindicated without explicit medical advice.
Magnesium also interferes with the absorption of certain antibiotics (tetracyclines, quinolones) and bisphosphonates: the usual rule is a several-hour delay, but it's up to your doctor or pharmacist to decide. Pregnancy, breastfeeding, diuretic treatment, or long-term stomach treatment: seek advice before starting. The most common side effect remains digestive, almost always related to too high a dose at once or an oxide form. Food supplements do not replace a varied diet and a healthy lifestyle.
Frequently Asked Questions
How long does it take for magnesium to take effect?
In weeks, not days, and with no perceptible effect immediately after taking it. Magnesium is neither a stimulant nor a sedative: nothing happens in the hour that follows, and expecting a strong feeling after three days mainly leads to overdosing. The usual course format is one to three months. If you are looking for an immediate effect on sleep or fatigue, you will be disappointed — and these symptoms, if they persist, should be evaluated by a medical professional rather than treated with a supplement.
What are the signs of magnesium deficiency?
Persistent fatigue, cramps, eyelid twitching, irritability, restless sleep: these are the commonly cited signs, and they are real. The problem is that they are non-specific. Lack of sleep, dehydration, overwork, anemia, or a thyroid disorder present exactly the same picture. None of these signs allow for a definitive conclusion, and standard blood tests do not accurately reflect the body's reserves. If these symptoms persist, consult a doctor rather than taking multiple supplements.
What causes magnesium deficiency?
Most often, a diet poor in magnesium-containing foods: the refining of cereals removes the bran and germ, where magnesium is concentrated. Added to this are increased losses—heavy sweating, intense exercise, certain diuretic or long-term stomach treatments—and situations where needs increase. Malabsorption or kidney disease can also be causes and should then be managed by a doctor.
What is the richest food in magnesium?
Pumpkin seeds, with over 500 mg per 100 g according to the ANSES Ciqual table. Followed by Brazil nuts (around 370 mg), almonds (270 mg), cashews (250 mg), raw buckwheat (230 mg), 70% dark chocolate (200 mg) and dried white beans (180 mg). Pay attention to the scale: these values are for 100 g, and a 30 g handful of almonds provides only about 80 mg. Mineral water also counts, with the richest exceeding 100 mg per liter.
Is it dangerous to take too much magnesium?
In adults with normally functioning kidneys, excess magnesium primarily results in loose stools or diarrhea: unabsorbed magnesium remains in the intestine and attracts water there. This is unpleasant but not dangerous, and it stops when the dose is reduced. EFSA sets a safety limit of 250 mg per day for magnesium from supplements, with magnesium from food not being subject to this limit. The real risk situation is kidney failure: the kidney can no longer properly eliminate the mineral, which then accumulates. In this case, no supplementation should be undertaken without explicit medical advice.
What is the best magnesium?
Bisglycinate for digestive tolerance, citrate or malate for quality/price ratio. Oxide and marine magnesium are the least well assimilated, despite high advertised dosages. The sorting criterion remains the same regardless of the brand: the "of which magnesium" line on the label, relative to the number of capsules to be taken.
Which magnesium to choose in a pharmacy?
The same criteria apply as elsewhere: the counter does not change the chemistry of the salt. Many products sold in pharmacies are based on oxide, hydroxide, or marine magnesium, which are the least soluble forms—hence the loose stools often reported. Turn the box over and look for the "of which magnesium" line and the name of the salt. A properly dosed bisglycinate or citrate is better than an oxide with a spectacular dosage. If you are on medication, the question to ask the pharmacist is less about the brand than about the timing of doses.
When to take magnesium, morning or evening?
Both are suitable: no optimal time has been demonstrated. What matters more is taking it with a meal and splitting the dose, for example, 100 to 150 mg in the morning and the same in the evening — better absorbed and much better tolerated than a single dose. Many people take their main dose in the evening, more out of habit than necessity. Do not expect a sedative effect: contributing to the normal functioning of the nervous system does not mean inducing sleep. A persistent sleep disorder should be addressed by a doctor.
How much magnesium per day?
Approximately 380 mg for adult men and 300 mg for women according to ANSES, including dietary intake. As a supplement, 100 to 300 mg of elemental magnesium covers most situations, within the 250 mg limit set by EFSA.
Which magnesium to take for cramps?
Magnesium contributes to normal muscle function, which explains the common association with cramps; this claim does not mean that a supplement will make a cramp disappear. If you simply want to secure your intake, choose a well-tolerated form—bisglycinate, citrate, or malate—rather than an oxide. For athletes, cramps are often also due to hydration, sodium, and accumulated fatigue: see our electrolytes. Frequent, nocturnal, or painful cramps should be examined by a doctor: their causes are numerous and often unrelated to magnesium.
What are the side effects of magnesium?
The most common are digestive: loose stools, diarrhea, bloating. This is almost always a matter of form and dose—oxide, hydroxide, and chloride are the most implicated, and a high single dose exacerbates the phenomenon. Switching to bisglycinate, splitting into two doses, and taking it with meals resolves most cases. Beyond that, accumulation can occur in cases of kidney failure, a situation that contraindicates any supplementation without medical advice. If discomfort persists despite these adjustments, stop and talk to your doctor or pharmacist.
Does magnesium cause weight gain?
No. Magnesium does not provide calories, and nothing attributes any effect on weight, in either direction, to it. The inverse question comes up just as often: a magnesium "for weight loss" does not exist, and no European claim supports this. A weight change or a feeling of water retention is very rarely explained by a mineral supplement. For body composition goals, diet and training are the deciding factors—see our weight loss section.
Can magnesium be taken with ongoing treatment?
This question should be addressed to your doctor or pharmacist, not a sales website: only they know your treatment, its dosage, and your medical history. What we can say without risk: magnesium is known to interfere with the absorption of several medications taken at the same time, particularly thyroid hormones, certain antibiotics, and bisphosphonates, which usually leads to spacing out doses by several hours. This spacing should not be improvised. Never modify a treatment on your own initiative and seek advice before starting supplementation.
Can magnesium and vitamin D be combined?
Yes, with no absorption problems: these are two distinct nutrients and there is no need to separate them during the day. They are often found together in autumn and winter routines. However, space magnesium apart from iron or zinc, as these minerals compete for absorption. See our vitamin D and omega 3 sections.
What magnesium brands do we offer?
Our selection prioritizes truly absorbable forms and labels that display elemental magnesium: Nutriting for a French bisglycinate with transparent dosages, IO.Genix for Albion® chelated bisglycinate and citrate, Now Foods for associated trace elements. All are part of our sports nutrition section.
Where can I find magnesium near Montpellier?
Our Vendargues store, about ten minutes from Montpellier, offers something that no product description can replace: turning over two containers and comparing the "of which magnesium" line. This is often where the difference between a bisglycinate and marine magnesium becomes evident. We also ship everywhere in France and Europe.
Sources: ANSES for nutritional references, Ciqual for food content, EFSA for the safety limit and authorized claims.
To learn more: our article on magnesium bisglycinate.
