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Quinton water — also known as marine plasma — is cold ultrafiltered seawater, rich in 78 minerals and trace elements in an ionic form directly assimilable by the body. Its name pays tribute to the French biologist René Quinton (1866–1925), who was the first to demonstrate the striking resemblance between the composition of seawater and that of human blood plasma. Its main documented benefits include deep remineralization, vitality support, aid in sports recovery, digestive and joint support — as part of a varied and balanced diet.
What is the composition of Quinton water?
What sets Quinton water apart from all other remineralizing products is its complete mineral profile — 78 elements present in trace amounts or significant quantities, in an ionic form that the body recognizes and directly assimilates. Frankly, no synthetic mineral supplement replicates this natural complexity.
Unlike regular table salt — even gray, pink, or Himalayan salt, which are exposed to oxygen, ultraviolet rays, or high temperatures during drying, altering their composition — Quinton water is cold-filtered to preserve the integrity of each mineral element. It is available in a 750 ml bottle, in large packaged formats, in drinkable ampoules, or as a nasal spray. Its content of essential minerals includes magnesium, calcium, sodium, potassium — and a multitude of trace elements present in trace amounts that remarkably bring its mineral composition close to that of human blood plasma. For the recommended daily intakes (magnesium: 300–380 mg/day, zinc: 8–11 mg/day), ANSES / Ciqual is referenced.
Here are four key trace elements in Quinton water and their documented roles:
Zinc: a cofactor in over 300 enzymatic reactions, involved in the production of gastric acid — essential for effective digestion. Its central role in adaptive immune response is well documented (Rink & Gabriel, 2000, Proceedings of the Nutrition Society).
Copper: a cofactor of enzymes involved in antioxidant defense, iron metabolism, and cellular energy production.
Manganese: involved in the metabolism of carbohydrates, lipids, and amino acids. A discreet but essential element.
Selenium: a key component of antioxidant selenoproteins that protect cells in the gastrointestinal tract (Rayman, 2000, The Lancet). One of the most cited studies on the subject.
What are the 10 benefits of Quinton water?
Concretely, here are the ten best-documented benefits of Quinton water — supported by its exceptional mineral totum and my personal field experience with this product over many years.
1. Deep remineralization of the body
To my knowledge, Quinton water is the most complete source of bioavailable minerals that exists. With the depletion of agricultural soils and intensive farming methods, finding a reliable source of assimilable minerals has become a real challenge. Quinton water meets this need with its 78 elements in ionic form, directly usable by cells without prior transformation.
2. Support for vitality and fight against fatigue
Magnesium deficiency is associated with chronic fatigue and vulnerability to stress (Tarleton et al., 2017, PLOS ONE). The hypertonic form is particularly suitable during periods of intense exhaustion — exams, professional overload, post-exercise recovery. For my part, it's the first thing I recommend to people who tell me "I'm feeling drained right now." Not miraculous, but real.
3. Contribution to the Normal Functioning of the Immune System
During winter or periods of decreased resistance, Quinton water contributes to the proper functioning of the immune system thanks to its zinc and selenium content—two minerals whose immune role is recognized by the EFSA. Zinc contributes to the normal functioning of the immune system. Selenium does too. And Quinton water provides both in a bioavailable form, as part of a varied and balanced diet.
4. Digestive Support and Intestinal Health
Zinc is involved in the production of gastric acid, an essential condition for proper digestion. The electrolytes in Quinton water help rebalance the intestinal environment. Some people notice an improvement in their digestive comfort within the first few weeks of a treatment. If you're interested in intestinal health, the combination of marine plasma + lacto-fermented foods is particularly relevant—I discuss it in our article on lacto-fermentation with marine plasma.
5. Joint Support and Osteoarthritis
Thanks to its concentration in mineral salts and trace elements, Quinton water can contribute to the rehydration and regeneration of joint cartilage—an interesting support for people suffering from osteoarthritis. It is possible to combine oral intake with injections in percutaneous hydrotomy performed directly at the level of painful joints, by a doctor or qualified professional (see the dedicated section below).
“It's been several months since I've had any pain (or even disability!) in my knees, thanks to hypertonic marine plasma.”
— Maï, Google review ★★★★★
6. Skin Care and Antiseptic Properties
When used topically as a spray, hypertonic Quinton water is recognized for its antiseptic and remineralizing properties. It can help relieve certain skin conditions such as eczema or psoriasis. And frankly, it's also one of the most practical things: a small spray in the first aid kit, also usable in the kitchen. Our article marine plasma and skin care details these uses in depth.
7. Sports Performance and Recovery
For athletes, the hypertonic form helps prevent muscle cramps and promotes recovery after exercise. It also allows for the rapid rebalancing of electrolytes lost through sweating during intense effort or a heatwave—useful in summer, in the mountains, or during competitions.
8. Liver Support
The liver constantly mobilizes minerals to ensure its enzymatic functions. Zinc, manganese, and selenium—all present in Quinton water in an assimilable ionic form—directly intervene in hepatic metabolism. Regular remineralization can thus support liver functions as part of a balanced diet. To learn more, check out our guide on the best foods and drinks to support liver health.
9. Support During Pregnancy, Growth, and Convalescence
The isotonic form is particularly suitable for people in convalescence, the elderly, and children during periods of rapid growth. Its salt concentration—identical to that of blood plasma—makes it a gentle option, without risk of overload for the body. In case of pregnancy, the isotonic form can help meet increased mineral needs, under medical supervision. See our 7 tips for preparing for a natural pregnancy.
10. Stress Reduction and Nervous System Support
During periods of mental overload or intense stress, hypertonic Quinton water can help support the body's functions. Magnesium plays a recognized role in regulating the nervous system and contributes to normal psychological function. A regular intake, especially in a bioavailable form like marine plasma, can make a difference during a difficult period.
“Marine plasma, recommended and prescribed by a naturopath, has amazing effects and really boosts health! A very good product.”
— Cécile B., Google review ★★★★★
How to Use Quinton Water?
Quinton water comes in two versions: hypertonic (pure form, the most concentrated) and isotonic (diluted form, concentration equivalent to blood plasma). The isotonic form is an integral part of my morning ritual: 20 ml diluted with three volumes of filtered water. Simple. Effective. And this has been the case for years.
What is important to understand is that this drink provides much more than essential minerals — it also delivers many trace elements in a directly assimilable form, which you won't find in regular salt, no matter how "natural" it is.
Recommended usual dosage:
- Isotonic: 20 to 30 ml per day, preferably in the morning on an empty stomach, possibly sublingually.
- Hypertonic: about one tablespoon per day, in targeted situations — intense fatigue, sports effort, acute electrolyte imbalance.
Replace your table salt shaker with a small spray filled with hypertonic Quinton water. It's a simple, daily gesture with real consequences on your mineral intake. And if you practice lacto-fermentation, use hypertonic Quinton water as is instead of water and salt — you'll combine the mineral benefits of marine plasma with those of fermented foods. Our article on lacto-fermentation with marine plasma explains how to do it concretely.
Quinton Water Injection: What is Percutaneous Hydrotomy?
Percutaneous hydrotomy involves injecting small amounts of Quinton water directly into subcutaneous tissues or around joints. It is a technique offered by various qualified health professionals — doctors trained in this approach, in particular — to promote the rehydration of intervertebral discs and the regeneration of arthritic joints.
This technique is not a treatment to be practiced on your own. If you wish to use it, consult a doctor who will assess if it is suitable for your situation and offer you a personalized protocol. The main risk — and this is the real answer to "Quinton water injection danger" — is not related to the product itself when used correctly, but to a practice not medically supervised. That's the essential takeaway.
Should You Buy Hypertonic or Isotonic?
It is, of course, much more economical to buy Quinton water in hypertonic form and perform the dilution yourself with quality filtered water. By buying isotonic, you are paying for the transport of an already diluted product. Prefer hypertonic: you can then use both forms (hypertonic or isotonic) according to your current needs. The reverse is not possible.
We strongly recommend Quinton water of excellent quality, harvested manually in the open sea after taking measurements, by boat — and not automatically and industrially pumped from the coast, which is the case with the vast majority of companies on the market. The marine environment is alive and moving, and the quality of the harvest is assessed on a case-by-case basis thanks to recognized expertise. We have personally attended several open sea harvesting campaigns. To fully understand the origin of the harvest (Mediterranean or Atlantic), check out our dedicated article.
How long should a Quinton water treatment last?
Typically, a Quinton water treatment lasts 20 to 30 days. This duration can vary according to individual needs, following the recommendations of a healthcare professional. It is advised to take a 10-day break between two treatments. After your treatment, you can continue to enjoy the benefits of Quinton water daily in small quantities — by replacing your salt shaker with a marine plasma spray, in cooking or during your meals.
When we are not the ones producing the products with our own requirements, we work only with the best global specialists. Very few professionals work this way — inquire, document yourself. Our product sheets and videos made on-site will provide you with more information.
“I am very satisfied with Quinton water. I've been drinking a glass on an empty stomach in the morning for 2 months.”
— M. Grewis, Trustpilot review ★★★★★
Quinton water and the liver: what is the connection?
The liver is one of the organs most demanding in minerals — it constantly mobilizes them to ensure its enzymatic functions. Zinc, manganese, and selenium, three elements present in Quinton water in an assimilable ionic form, directly intervene in hepatic metabolism. Regular remineralization can thus support liver functions as part of a balanced diet. This is not a therapeutic promise, it's basic biochemistry. To delve deeper into this topic, I have written a comprehensive guide on the best foods and drinks to support liver health.
What are the side effects and contraindications of Quinton water?
Even though Quinton water is a natural product from the sea, it can rarely cause some side effects in certain people — digestive issues or allergic reactions in particular. The golden rule: start with very small quantities, gradually increase, and listen to your body. Seeking medical advice before a first treatment is always a good idea ("Quinton water medical advice" — this is indeed the right approach).
What are the dangers of Quinton water?
Quinton water is generally well tolerated and considered safe for most people when used correctly. The main risks to be aware of:
- Allergic reactions: rare, but possible to the minerals or natural components of seawater.
- Possible contamination: it is essential that Quinton water is properly filtered and sterilized. This is why the quality of the harvest and processing is crucial.
- Electrolyte imbalance: excessive consumption can disrupt mineral balance, especially in people with kidney or heart conditions.
- Inappropriate use: Quinton water should not replace medical treatment without appropriate advice.
Absolute contraindications for the hypertonic form:
- Uncontrolled high blood pressure
- Kidney or heart failure
- Strict low-sodium diet
- Hyperthyroidism (caution due to iodine content)
- Generalized edema
To ensure the safety and effectiveness of the product, purchase it from reliable sources that guarantee purity, quality of harvest, and filtration protocol.
What are the side effects of hypertonic Quinton water?
Hypertonic Quinton water may cause, in some people, nausea, vomiting, diarrhea, or abdominal pain. These effects are not systematic and vary from person to person. Most people do not experience serious side effects. Consult your doctor before starting, especially in cases of hypersensitivity, hypertension, or kidney problems — and be accompanied by a healthcare professional for your first treatment.
FAQ — Your questions about Quinton water
Why take Quinton water?
Quinton water is taken for its exceptional richness in bioavailable minerals and trace elements (78 elements in ionic form). It is indicated in cases of fatigue, mineral deficiency, stress, intense physical effort, or to support the proper functioning of the immune system. Its composition, similar to blood plasma, makes it a unique natural supplement, as part of a varied and balanced diet and a healthy lifestyle.
Is Quinton water good for joints and osteoarthritis?
Quinton water has recognized remineralizing properties and can contribute to the rehydration and regeneration of joint cartilage. It is often cited as support in cases of osteoarthritis, sometimes in combination with a percutaneous hydrotomy protocol performed by a qualified healthcare professional. It does not replace medical treatment and its use should be discussed with your doctor.
What are the side effects of isotonic Quinton water?
The isotonic form is generally very well tolerated because its salt concentration is identical to that of blood plasma. Mild digestive effects (bloating, loose stools) may occur at the start of treatment if doses are increased too quickly. Start with small amounts (5 to 10 ml) and increase gradually.
What are the contraindications to consuming Quinton water?
The main contraindications concern the hypertonic form: uncontrolled high blood pressure, kidney failure, heart failure, generalized edema, strict low-sodium diet, and hyperthyroidism (due to iodine content). It is imperative to consult a doctor before starting a treatment, especially in cases of pre-existing conditions or during pregnancy.
What is the difference between hypertonic and isotonic Quinton water?
Hypertonic Quinton water is the pure form (about 33 g/L of minerals): indicated in targeted situations such as intense fatigue, sports effort, or acute electrolyte imbalance. The isotonic version is diluted (about 9 g/L, similar to blood plasma): better suited for daily intake and for vulnerable people (elderly, children, pregnant women). In summary — buy hypertonic and do the dilution yourself, it's more economical and flexible.
Is Quinton water good for the liver?
Quinton water contains zinc, manganese, and selenium in an assimilable ionic form. These three minerals are involved in the liver's enzymatic functions. Regular remineralization can thus support liver function as part of a balanced diet and healthy lifestyle. This support is complementary and does not replace medical follow-up in cases of proven liver pathology.
How long does it take to see the effects of Quinton water?
A standard course lasts 20 to 30 days, with a 10-day break before starting again. Some people report an improvement in their vitality as early as the first or second week. The effects on joints or tissue regeneration are generally felt over a longer period, with appropriate medical follow-up.
Can Quinton water be used in cooking?
Yes — and it's one of the simplest and most effective ways to consume it regularly. Replace your salt shaker with a small spray of hypertonic Quinton water to season your dishes cold. It can also replace water and salt in lacto-fermentation preparations, thus combining the mineral benefits of marine plasma with those of fermented foods. To try it is to adopt it!
Is the injection of Quinton water (percutaneous hydrotomy) dangerous?
Percutaneous hydrotomy is a medical technique performed exclusively by qualified professionals (trained doctors, physiotherapists). It is not practiced in self-medication. When medically supervised, it is generally well tolerated. The risks associated with unsupervised practice (contamination, inappropriate dosage) are real — hence the importance of consulting a healthcare professional before any procedure.
Scientific References
- Quinton, R. (1904). Seawater, organic medium: constancy of the original marine environment as a vital medium for cells, throughout the animal series. Paris: Masson. (Foundational historical reference.)
- Rink, L. & Gabriel, P. (2000). Zinc and the immune system. Proceedings of the Nutrition Society, 59(4), 541–552. (Review study.)
- Rayman, M.P. (2000). The importance of selenium to human health. The Lancet, 356(9225), 233–241. (Review study — high level of evidence.)
- Tarleton, E.K. et al. (2017). Role of magnesium supplementation in the treatment of depression: A randomized clinical trial. PLOS ONE, 12(6). (Randomized clinical trial.) ⚠️ To be validated before publication: check that the DOI indeed refers to this trial and that its conclusions on fatigue are consistent with the indicated use.
- ANSES — Ciqual: Nutritional composition table of foods. Reference data for recommended daily mineral intakes.
Disclaimer: The information presented in this article is provided for informational purposes and does not constitute medical advice. Consult a qualified healthcare professional before making any changes to your diet or supplementation. As part of a varied and balanced diet and a healthy lifestyle.
Update: March 2026. Article validated by Éric Viard, founder of Biovie and engineer ISTOM, co-author of “Algues au quotidien” (Gallimard, 2024) — Best Cookbook in the World, Gourmand Cookbook Awards 2025, and Best Cookbook in France, National Academy of Cuisine 2025.
