In hot weather, after exercise, or when experiencing fatigue, sodium-rich water can become your best ally for hydrating your body. It helps you compensate for electrolyte losses, especially when you sweat a lot. But beware: in nutrition, everything is a question of context and moderation. In this article, we present the benefits and risks of sodium waters, situations in which you can consume them – and those where they should be avoided – as well as the most interesting brands according to your needs.
Sodium: role, sources, and needs
What is sodium?
Sodium is an electrolyte, meaning an essential mineral present in the blood and in extracellular fluids. Like potassium, calcium, or magnesium, it is essential for the proper functioning of the body. Present in small quantities in tap water, it is mainly found in many foods and beverages.
Where is sodium found?
It mainly comes from food. Table salt is its main source. It is therefore found in salty foods, processed, dried, and smoked foods such as cured meats, cheeses, breads, sauces, ready meals, industrial soups or broths… Some natural mineral waters and sports drinks also contain it, as do oral rehydration solutions (ORS).
What are the benefits of sodium?
This mineral helps the body maintain good hydration. It acts in synergy with calcium and magnesium to support muscle contraction and bone health. As a micronutrient, it is also involved in several vital functions for your body: blood pressure regulation, nerve impulse transmission, and the transport of certain nutrients across cell membranes.
What are the effects of sodium deficiency?
Excess salt is harmful, but a deficiency (hyponatremia) can also be problematic. And when it is, you may experience fatigue, headaches, cramps, or confusion. In athletes or in hot weather, excessive loss of water and sodium can cause quite advanced dehydration.
What water to drink for a lack of sodium?
If the deficiency is confirmed, opt for a bottle of sodium mineral water, still or sparkling. It offers a stable mineral intake, unlike overly salty sources like industrial broths or too caloric ones like sodas. We will present the richest waters later in the article.
Is the sodium in mineral waters well absorbed?
The sodium contained in mineralized water is quickly absorbed by the intestine. This is why this type of liquid is particularly indicated during hot weather, for athletes, or to compensate for significant losses due to perspiration, prolonged effort, or certain digestive disorders.
The richest sodium waters: brand comparison
Which water has the most sodium?
Some mineral waters have a much higher sodium content than the average (220 mg/L). They are ideal for compensating for electrolyte losses but should not be abused!
| Brand | Sodium (mg/L) | Magnesium (mg/L) | Calcium (mg/L) | Bicarbonates (mg/L) | Sulfates (mg/L) | Suitable for ... |
| St-Yorre | 1708 | 11 | 90 | 4774 | 174 |
Athletes, post-exercise recovery, high bicarbonate levels, good for digestive disorders |
|
Vichy Célestins |
1172 | 10 | 103 | 2989 | 138 | Digestion, recovery |
| Arvie | 650 | 92 | 170 | 2195 | 31 | Physical exertion, adults |
| Rozana | 493 | 160 | 301 | 1837 | 230 | High magnesium and calcium, adults, active people |
Which water is the lowest in sodium?
To limit your salt intake, some mineral waters are particularly suitable. You can drink them daily, but they are primarily recommended for people on a low-sodium diet or for infants.
| Brand | Sodium (mg/L) | Magnesium (mg/L) | Calcium (mg/L) |
Bicarbonates (mg/L) |
Sulfates (mg/L) |
|
Mont Roucous |
2.8 | 0.2 | 1.2 |
4.9 |
3.3 |
| Evian | 6.5 | 26 | 80 |
360 |
14 |
| Contrex | 9.4 | 74.5 | 468 |
372 |
1121 |
| Volvic | 12 | 8.2 | 11 |
59 |
9 |
| Hépar | 14.2 | 119 | 549 |
387.3 |
1530 |
Sodium, diet, and health: good habits
Sodium and diet: how much do we consume?
As we have already mentioned, sodium mainly comes from added salt to dishes and processed products. Even if the body needs it, our actual consumption often exceeds WHO recommendations, set at approximately 2g per day (i.e., 5g of salt).
Therefore, read labels to identify hidden sodium in industrial products: sauces, cereals, canned goods, dairy products, biscuits, chocolates, sodas…
Excess salt and water retention
Too much salt promotes water retention, which usually causes swelling, a feeling of heavy legs, or temporary weight gain. Reducing the consumed amount helps maintain mineral balance, especially with potassium, which helps counterbalance the effects of sodium on blood pressure.
Sodium and high blood pressure: a link to monitor
Chronic excess salt increases the risk of high blood pressure and stroke, particularly in the elderly or those with kidney failure. If you are concerned, a low-sodium diet is strongly recommended, while ensuring adequate hydration.
Should you drink sodium-rich water? For whom, when, how?
You can drink sodium mineral water occasionally:
- As part of prolonged physical activity for athletes ;
- In case of digestive disorders related to a significant loss of mineral salts;
- In case of dehydration in hot weather.
However, it should be avoided for daily consumption, especially if you are on a low-salt diet or are hypertensive. If in doubt or if you suffer from a chronic illness, seek your doctor's advice.
Frequently Asked Questions (FAQ) about sodium-rich water
1. Which water contains the most sodium?
St-Yorre tops the ranking with 1708 mg per liter.
2. What water to drink in case of sodium deficiency?
In case of confirmed deficiency, you can drink mineral water like Saint-Yorre if your doctor recommends it.
3. What is the beverage richest in sodium?
Salty broths, some highly mineralized sparkling waters, and specific rehydration drinks. They should be consumed in moderation if you do not have specific needs.
4. Is the sodium in water well absorbed?
Yes. It is easily absorbed by the body. Its bioavailability is high, making it an effective source for meeting a temporary need for mineral salts.
5. Is it dangerous to drink sodium-rich water every day?
Yes, for people suffering from hypertension, heart failure, or certain kidney diseases. If you are concerned, it is best to seek advice from your doctor.
6. Which water is the lowest in sodium?
According to our ranking, it's Mont Roucous, 2.8 mg/L.
7. Is sparkling water necessarily rich in sodium?
No. It is the natural mineral composition of the water that determines its content.
8. What are the signs of a lack of sodium in the body?
The most common symptoms are: fatigue, muscle cramps, headaches, confusion, and, in severe cases, nausea or convulsions. A blood test is necessary to confirm hyponatremia.
Conclusion
Sodium, which is not limited to table salt (sodium chloride), is an essential mineral. It plays a key role in hydration and the functioning of muscles and the nervous system. Present naturally in some foods, it is also found in some mineral waters, with highly variable concentrations. The choice of a sodium-rich water primarily depends on your needs. You can consume St-Yorre and Vichy Célestins occasionally (intense effort, high heat, significant fluid loss). However, if you need to limit salt, opt for a low-mineral water like Mont Roucous.
Bibliography
Strazzullo, P., & Leclercq, C. (2014). Sodium. Advances in nutrition (Bethesda, Md.), 5(2), 188–190. https://doi.org/10.3945/an.113.005215
Rondon, H., & Badireddy, M. (2023, June 14). Hyponatremia. In StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing.
https://www.ncbi.nlm.nih.gov/books/NBK470386
Wright, E. M., & Loo, D. D. (2000). Coupling between Na+, sugar, and water transport across the intestine. Annals of the New York Academy of Sciences, 915, 54–66.
https://doi.org/10.1111/j.1749-6632.2000.tb05223.x
Aburto, N. J., Hanson, S., Gutierrez, H., Hooper, L., Elliott, P., & Cappuccio, F. P. (2013). Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses. BMJ (Clinical research ed.), 346, f1378. https://doi.org/10.1136/bmj.f1378
Strazzullo, P., D’Elia, L., Kandala, N.-B., & Cappuccio, F. P. (2009). Salt intake, stroke, and cardiovascular disease: Meta-analysis of prospective studies. BMJ, 339, b4567. https://doi.org/10.1136/bmj.b4567
Queneau, P., & Hubert, J., au nom d’un groupe de travail. (2019). Place des eaux minérales dans l’alimentation / Mineral water as part of the daily diet. Revue Française d’Allergologie et d’Immunologie Clinique. https://doi.org/10.1016/S0001-4079(19)33143-7
Agence nationale de sécurité sanitaire de l’alimentation, de l’environnement et du travail (Anses). (2025, mai 28). Les substituts au sel de table : un risque pour la santé.
https://www.anses.fr/fr/content/les-substituts-au-sel-de-table-un-risque-pour-la-sante
