Zuletzt aktualisiert am 25.09.2026
Perhaps someone recommended that you take magnesium. Maybe you're simply curious about what this mineral actually does in the body. Or perhaps you know the muscle cramps that occur after exercise, leaden fatigue in the afternoon, or inner tension with no apparent reason - and you're wondering whether a deficiency could be behind it. Whatever brought you here: You'll find the answers here.
We are clearing up all the questions surrounding magnesium and will take an in-depth look at this micronutrient over the next few minutes. So: What is magnesium good for? What effects does it have in the body, how can you recognize a deficiency, and which form of magnesium is right for which need?
Your knowledge to go: What is magnesium good for?
-
Magnesium has many different sites of action and is involved as a cofactor in many processes. Here are some important functions:
-
Muscle function: Magnesium contributes to normal muscle function; it regulates muscle contraction and nerve transmission.
-
Mental function & fatigue: Magnesium contributes to normal psychological function and can help reduce tiredness and fatigue.
-
Bones and teeth: Magnesium contributes to the maintenance of normal bones and teeth.
-
Energy metabolism: This mineral contributes to normal energy metabolism.
-
A deficiency can lead to symptoms such as tiredness or muscle cramps.
What is magnesium actually good for? Its effects in the body
You hear a lot about this small mineral, from cramps and nerves to tiredness & exhaustion. But how much truth is there to it? What exactly does magnesium do in the body? Here are its most important functions:
-
Normal energy metabolism: Magnesium is a cofactor in ATP production, glycolysis, and numerous oxidative processes that provide energy.
-
Normal muscle function: Magnesium regulates muscle contraction and relaxation throughout the musculature.
-
Normal nervous system function: It supports signal transmission between nerves and muscles.
-
Electrolyte balance: Magnesium works together with potassium and calcium and contributes to maintaining electrolyte balance.
-
Protein synthesis: Magnesium contributes to normal protein synthesis - one reason why athletes often talk about magnesium.
-
Reduction of fatigue: Magnesium helps reduce tiredness and fatigue.
So what do we need magnesium for, fundamentally speaking? The effects of magnesium can be seen wherever your body needs energy, movement, or communication between cells.
%-product_content-%
Now you know what magnesium is good for! Next, we will look at a few special functions in detail.
Magnesium in women and men: Are there any differences?
What is magnesium good for when looking at women and men separately? Are there any differences at all? We took a very close look:
What is magnesium good for in women?
Although the effects are the same in women and men, women often look at magnesium from a different perspective than men. For many women, the focus is particularly on energy metabolism, fatigue, and the nervous system. (And that does not mean women are not interested in sports - quite the opposite. However, many women tend to use other supplements for that.)
And: Through the menstrual cycle, pregnancy, breastfeeding, and menopause, women go through hormonal phases that can affect their magnesium requirements. If this topic interests you, feel free to take a look at our article “Which supplements are useful for women?”.
What is magnesium good for during pregnancy? During pregnancy, magnesium performs the same functions as usual - muscle function, energy, the nervous system & more. According to the DGE, the daily requirement is around 300 milligrams - just as high as outside pregnancy.
And what is magnesium good for in men?
Here too, it is worth taking a look at what magnesium is good for. The basic effects are identical in men and women, but men are often interested in magnesium in the context of sports and energy levels.
Because magnesium contributes to normal muscle function and electrolyte balance. People who sweat a lot may experience increased magnesium loss. According to the DGE, adult men have an estimated daily requirement of around 350 milligrams; with intense exercise, the requirement may be higher. You can read more about whether taking it is more beneficial before or after exercise in our separate article.
Is magnesium really that important for the body?
Okay, we now know what magnesium is good for... but is it really that important to get enough magnesium?
Yes, because it is involved in many functions throughout the body, and magnesium is also essential. The body cannot produce magnesium itself - every milligram comes from food or dietary supplements.
Don't worry: You can usually meet your needs through your diet. Good sources include nuts, legumes, green vegetables, and whole-grain products; some mineral water also provides more than 50 mg of magnesium per litre. You can find more sources here: Where is magnesium found?
%-product_content-%
It sounds quite simple, but: Even so, not everyone reaches the recommended amount in everyday life. What happens if you consume too little magnesium over the long term? We will also look at this in the article “What is magnesium good for?” in the very next section:
Magnesium deficiency: These symptoms you should know
How can you tell if you have a magnesium deficiency? It is not always easy, because the symptoms are often very nonspecific. Nevertheless, there are typical signs you should know:
-
Muscle symptoms: Cramps (e.g. calf cramps), twitches, tension even without intense exertion.
-
Nervous system: Tingling in the hands or feet, inner restlessness, irritability.
-
Cardiovascular system: Palpitations, irregular heartbeat, fluctuations in blood pressure - please always have these medically checked!
-
Tiredness and exhaustion: Persistent tiredness, often accompanied by concentration problems.
-
Sleep problems: Difficulty falling asleep, restless sleep, frequent waking.
-
Other symptoms: Headaches, loss of appetite, nausea, mood swings.
Important regarding blood values: Only around 1% of the total magnesium in the body is found in the blood. A normal serum level therefore does not rule out a latent deficiency in tissues and bones.
With this knowledge and the facts we have just clarified about what magnesium is good for, it is also clear why magnesium is so important. If you notice these symptoms in yourself, or simply feel that you are not getting enough magnesium, it is therefore always worth talking to your doctor.
Can the body store magnesium?
Yes, but with limitations: Most of the magnesium in the body (more than 50-60%) is stored in the bones, around 30% in the muscles, and less than 1% circulates in the blood. The bones serve as a kind of emergency reserve and can release magnesium when intake is temporarily too low.
Nevertheless, regular intake through food or dietary supplements remains important because the body uses and excretes magnesium every day. Serum levels (i.e. blood levels) typically fall only after a prolonged period of insufficient intake - one reason why a deficiency often goes unnoticed for a long time. This is also relevant when we look at what magnesium is good for: it also serves as a reserve in the body.
Which form of magnesium is good for what? The individual compounds at a glance
“Magnesium” is not the same as “magnesium”! The element occurs in various chemical compounds with different solubility and bioavailability. Organic forms (e.g. citrate, bisglycinate) are generally more soluble, while inorganic forms (e.g. oxide) often provide more milligrams per capsule but have a lower absorption rate. Let's start with the question of what magnesium in its various forms is good for.
What is magnesium citrate good for?
Magnesium citrate is an organic, highly water-soluble compound. A review by Pardo et al. (2021, Nutrition) found better bioavailability for organic magnesium compounds than for inorganic ones such as oxide. The disadvantage: Citrate can cause discomfort in people with sensitive digestion.
What is magnesium bisglycinate good for?
Magnesium bisglycinate is a chelated form: Magnesium binds to two molecules of the amino acid glycine. This compound is often described as particularly gentle on digestion. This form was investigated in a study by Schuster et al. (2025) in adults in the context of sleep - with exciting results! You can read more in our article about whether taking magnesium in the morning or evening makes more sense.
What is magnesium malate good for?
Magnesium malate combines magnesium with malic acid (malate), which itself plays a role in energy metabolism as part of the citric acid cycle. This is why the combination is popular in the sports context.
What is magnesium oxide good for?
Magnesium oxide is an inorganic, highly concentrated form. Advantage: Each capsule contains a larger amount of elemental magnesium, which often makes oxide supplements more affordable. Disadvantage: Studies show that absorption is lower than with organic forms, and people with sensitive digestion may experience stomach discomfort. Oxide may still be a sensible choice in individual cases, for example if budget is a factor.
What is a magnesium complex good for?
A magnesium complex combines several magnesium compounds in one product, such as citrate and bisglycinate. The idea behind it: a mixture of fast- and slower-dissolving forms that cover different absorption profiles. No single form has proven superior in all respects. A complex can be useful when it is unclear which form is individually the best fit. For example, our vegan magnesium complex combines four organic forms (citrate, malate, bisglycinate, taurate) and deliberately omits magnesium oxide.
%-split_content-%
Conclusion: What is magnesium good for - and what will you do with this knowledge now?
Now you know what magnesium is good for: Magnesium is one of the basic building blocks for muscles, nerves, energy supply, bones and more. Severe deficiency is rare in Central Europe, but suboptimal intake affects more people than you might think!
What you can do now: Take an honest look at your diet: How often are whole-grain products, legumes, nuts and green leafy vegetables on your menu? Consciously observe symptoms without overestimating them. And if taking supplements seems sensible, pay attention to the right form, because bioavailability is more important than the price per milligram. If you are unsure, seek medical advice, have your blood levels checked and approach supplementation mindfully rather than panicking.
Do you have any questions? Then feel free to email me - I look forward to hearing from you! :) And if your friends ever ask you what magnesium is actually good for ... now you know. ;)
Literature & sources
-
German Nutrition Society (DGE): Reference values for nutrient intake - magnesium. DGE.
-
EFSA NDA Panel: Scientific Opinion on Dietary Reference Values for magnesium. European Food Safety Authority, 2015.
-
EU Register of nutrition and health claims made on foods pursuant to Regulation (EC) No 1924/2006, updated version.
-
Pardo, M.R. et al.: Bioavailability of magnesium food supplements: A systematic review. Nutrition, 2021.
-
Schuster, J., Cycelskij, I., Lopresti, A., Hahn, A.: Magnesium Bisglycinate Supplementation in Healthy Adults Reporting Poor Sleep: A Randomized, Placebo-Controlled Trial. Nature and Science of Sleep, 2025.
In this article, “What is magnesium good for?” we adhere to the EFSA guidelines. If you would like to learn more about the topic, I recommend reading studies on magnesium!
