Magnesium: the anti-fatigue and anti-stress combination that I forget too often

If I had to choose a single mineral to optimize to transform my daily life, it would be magnesium.

Persistent fatigue despite proper sleep, nocturnal muscle cramps, increased stress in trivial situations, difficulty falling asleep, unexplained irritability, recurring headaches... These disparate symptoms often have a common denominator that we do not suspect enough: magnesium deficiency. According to data from ANSES, 70 to 80% of French people do not achieve the recommended daily intake of magnesium. It is one of the most widespread - and most underdiagnosed - nutritional deficiencies in the French population. And yet, the solutions are simple, concrete and very accessible. I show you how.

1. Magnesium: a mineral with strategic roles

Magnesium is the 4th most abundant mineral in the human body and the 2nd intracellular cation after potassium. The adult body contains around 25 g, distributed mainly in bones (60%), muscles (25%) and soft tissues (15%). Less than 1% circulates in the blood, which makes the blood dosage poorly representative of real reserves.

What makes magnesium so strategic is its involvement in an exceptional number of biological processes:

• ●Cofactor in more than 300 enzymatic reactions, including the production of ATP (cellular energy) in mitochondria

• ●Synthesis of proteins, DNA and RNA

• ●Regulation of the nervous system: modulation of NMDA glutamate receptors and GABA receptors, the two main excitatory and inhibitory neurotransmitters

• ●Muscle relaxation: calcium antagonist, it allows muscles to relax after contraction

• ●Regulation of blood sugar and insulin sensitivity

• ●Balance of blood pressure via relaxation of vascular walls

• ●Synthesis and regulation of melatonin and serotonin

This list explains why magnesium deficiency can manifest itself with such varied and seemingly unrelated symptoms: magnesium is involved in almost all important biological functions.

Symptom	Mechanism linked to magnesium deficiency
Persistent fatigue	Magnesium is essential for the production of ATP. Without it, the cellular energy machine idles.
Cramps and muscle spasms	Magnesium allows muscle relaxation by antagonizing calcium. Its deficit causes muscular hyperexcitability.
Amplified stress and anxiety	Magnesium modulates the hypothalamic-pituitary-adrenal axis. Its deficiency amplifies cortisol secretion and hyperreactivity to stress.
Sleep disorders	Magnesium participates in the synthesis of melatonin and regulates GABA receptors. Its deficit disrupts falling asleep and the quality of deep sleep.
Headaches and migraines	Several studies have shown an association between low magnesium levels and frequency of migraines. Supplementation reduces their frequency in certain subgroups.
Irritation and mood swings	Magnesium modulates serotonin synthesis and the central nervous system response to stress.
Heart palpitations	Magnesium regulates cardiac electrical conductivity. Its deficit can cause mild arrhythmias and palpitations.

2. Signs of magnesium deficiency: is this my case?

Magnesium insufficiency is sneaky: it sets in gradually and its symptoms are often attributed to stress, overwork or lack of sleep. Here are the most common signals:

If I recognize myself in several of these symptoms, it is worth evaluating my dietary magnesium intake and considering, after medical advice, targeted supplementation.

Food	Mg per 100 g	Helpful tip
Dried pumpkin seeds	~550 mg	1 handful (30 g) = 165 mg. The champion in all categories
Son de ble	~520 mg	To add to yogurts or pastas bread
Flax or chia seeds	~350 mg	1 tbsp. tbsp (15 g) in yogurt or salad #B2DFDB;color:#374151;vertical-align:top;background:#F4FBFA">~370 mg selenium
Almonds	~270 mg	30 g = approximately 80 mg of magnesium. Ideal snack
Dark chocolate 70% minimum	~230 mg	2 squares = ~50 mg. A doubly beneficial pleasure
Cooked white beans	~60 mg	150 g per serving = ~90 mg. Economic source
Cooked buckwheat	~55 mg	Excellent starchy anti-inflammatory and without gluten
Cooked spinach	~80 mg	Cooking increases the bioavailability of magnesium
Mg-rich mineral water (Hepar, Contrex)	~100 mg/L	One liter of Hepar = 110 mg of magnesium assimilable

## 3. Why 75% of French people lack magnesium

Magnesium deficiency is not inevitable. It is the direct product of our contemporary lifestyles and eating habits:

• ●Impoverished ultra-processed food: the refining of cereals eliminates almost all of the magnesium present in whole grain. White flour contains 3 to 4 times less magnesium than wholemeal flour. Ultra-processed foods, poor in whole foods, are therefore particularly low in magnesium.

• ●Chronic stress depletes reserves: stress activates the secretion of cortisol, which increases urinary excretion of magnesium. The more stressed I am, the more magnesium I eliminate. And the less magnesium I have, the more sensitive I am to stress. A documented vicious circle.

• ●Alcohol increases urinary elimination: alcohol consumption increases renal excretion of magnesium, contributing to the depletion of reserves.

• ●Sweat: intensive sport and high heat increase magnesium losses through perspiration.

• ●Soil impoverishment: intensive agricultural practices have reduced the magnesium content of soils by 20 to 30% in 50 years, according to analyzes published by INRAE. Current fruits and vegetables therefore contain less magnesium than those of a few decades ago.

4. The best food sources of magnesium

The objective recommended by ANSES is 380 mg/day for adult men and 300 mg/day for adult women. During periods of intense stress or sustained sport, needs increase significantly.

5. Magnesium supplementation: when and how?

When food is not enough to cover needs - which is common in times of chronic stress, persistent fatigue or intense sport - magnesium supplementation can be an effective option. But not all forms of magnesium are equal:

• ●Preferred forms: magnesium bisglycinate (or glycinate) and magnesium malate are the forms best absorbed and best tolerated digestively. Marine magnesium (magnesium hydroxide) is an acceptable natural option but has lower bioavailability.

• ●Forms to avoid: magnesium oxide and magnesium carbonate have a very low bioavailability (4-5%) and often cause digestive problems (diarrhea). However, these are the most common forms in inexpensive supplements.

• ●Practical dosage: 300 to 400 mg of elemental magnesium per day, preferably in the evening (its relaxing effect promotes sleep). A course of 1 to 3 months is generally necessary to replenish the reserves.

• ●Association with vitamin B6: vitamin B6 improves the penetration of magnesium into cells and potentiates its effect on the nervous system. Many supplements combine them for this reason.

I consult my doctor before any prolonged supplementation, particularly in cases of renal pathology (the kidneys being responsible for the excretion of excess magnesium).

6. My concrete action plan to increase my intake

• ●I start with a quick audit of my plate: am I eating oilseeds, legumes, whole grains and green vegetables regularly? If the majority answer is no, I have immediate leverage.

• ●I add a handful of pumpkin seeds or almonds to my morning or afternoon snack: it's the simplest and most impactful gesture.

• ●I replace my refined cereals with their complete versions: oatmeal instead of puffed cereals, wholemeal bread instead of white bread, wholemeal rice instead of white rice.

• ●I treat myself to 2 squares of minimum 70% dark chocolate every evening: pleasure and magnesium at the same time. Difficult to find better.

• ●In times of intense stress or persistent fatigue, I consider a 1 to 3 month course of magnesium bisglycinate: 300 mg in the evening after dinner. The effects are generally noticeable within 3 to 4 weeks.

• ●I rinse away my daily stress with mineral water rich in magnesium: a liter of Hepar or Contrex makes a significant contribution to my daily needs.

  💡 tips to remember

  1. 75% of French people lack magnesium: fatigue, cramps, increased stress, sleep disorders and irritability are the first signals to identify.
  2. Stress depletes magnesium, and the lack of magnesium amplifies stress: this is the most common vicious circle. Replenishing your reserves is one of the most effective interventions in health prevention.
  3. My top 3 daily food sources: a handful of pumpkin seeds (550 mg/100g), 2 squares of 70% dark chocolate (230 mg/100g), a serving of almonds (270 mg/100g).
  4. I replace my refined cereals with whole grain versions: it's the simplest change to sustainably increase my magnesium intake.
  5. As a treatment, I choose magnesium bisglycinate: better absorption, better digestive tolerance. 300 mg in the evening for 1 to 3 months. The effects arrive in 3 to 4 weeks.
  6. I drink mineral water rich in magnesium: Hepar or Contrex make a significant contribution to my daily needs in a very well assimilated form.
  7. The combination of magnesium + vitamin B6 is synergistic: B6 improves the cellular penetration of magnesium and potentiates its effects on the nervous system.