What is seawater, and why is it beneficial?
Seawater is a natural fluid rich in minerals and trace elements, including magnesium, calcium, potassium, zinc, and sodium.
It is traditionally used in cosmetics, nasal hygiene, and thalassotherapy for its various benefits for the skin, respiratory tract, and overall well-being.
Its unique mineral composition, when diluted and isotonic, makes it similar to the natural environment of cells, which explains its value in nasal hygiene and cosmetics.
Seawater intended for human use must be purified, filtered, and packaged according to strict health standards: never use untreated beach water for internal or nasal use.
What are the benefits of seawater for the skin?
Seawater offers several cosmetic benefits for the skin when used as part of a tailored skincare routine:
- A feeling of purification: its gentle action is particularly suitable for oily skin prone to blemishes.
- Mineral enrichment: Its high mineral content visibly supports skin balance and hydration.
- Relief from discomfort: a welcome comfort for sensitive skin; for eczema, psoriasis, or atopic dermatitis, the product is a cosmetic supplement to be used alongside a prescribed medical treatment—never as a substitute.
- Gentle exfoliating effect: helps remove dead skin cells from the surface, for a smoother-looking complexion.
- Visibly supports skin firmness: application stimulates a sensation of freshness and visibly supports skin comfort.
Seawater, in the form of a mist or lotion, can be applied daily to visibly revitalize the skin and provide a refreshing effect.
Is seawater effective for the respiratory tract?
Isotonic or hypertonicseawater nasal spray is widely used for daily nasal hygiene:
- Common cold and nasal congestion: Nasal irrigation helps remove mucus and secretions and provides a noticeable decongestant effect.
- Sinusitis: useful for nasal hygiene as a supplement to treatment prescribed by a doctor (never as a substitute).
- Seasonal allergies: Regular nasal irrigation helps mechanically remove allergens (pollen, dust) and can alleviate the perception of symptoms.
- Daily nasal hygiene: Regular use helps maintain mucosal comfort, particularly in winter or in polluted environments.
For asthma, chronic bronchitis, ear infections, persistent ENT infections, or any concerning symptoms, seawater is NEVER a substitute for medical treatment: a medical consultation is essential. Vigorous nasal irrigation is also contraindicated in cases of a perforated eardrum.
What are the benefits of seawater for the body?
In thalassotherapy or thalassobalneotherapy,seawater is traditionally used for its remineralizing properties and its relaxing effect:
- Mineral intake: beneficial as part of a balanced diet and following medical advice; marine magnesium therapy is a recognized supplement in certain specific situations.
- Sense of relaxation: The marine environment and magnesium contribute to a welcome sense of calm.
- Support for microcirculation: Soaking in saltwater at an appropriate temperature helps create a sensation of lightness in the legs; in cases of persistent heavy legs, swelling, or edema, a medical consultation is recommended to rule out a circulatory disorder.
- Joint and muscle comfort: a soothing effect is felt after physical exertion; in cases of persistent pain, a medical consultation is essential.
Thalassotherapy remains a wellness and preventive treatment: it is never a substitute for ongoing medical treatment.
Is seawater beneficial for hair?
Seawater offers benefits for hair, provided it is used properly:
- A sensation of scalp purification: may help control oiliness on scalps prone to excess oil.
- Mineral content: strengthens the hair shaft and adds body to fine hair.
- Natural texturizing effect: a slightly drying action that creates a “wavy” look and adds volume.
Prolonged exposure to seawater can dry out the hair: rinse with fresh water after swimming and always moisturize with a nourishing treatment.
Can you drink seawater?
Raw seawater is not safe to drink: its high salinity causes dehydration and can be dangerous to the kidneys if consumed in large quantities.
Some seawater-based solutions are available in prepared and filtered forms:
- Marine plasma (known as “Quinton”): a long-established product with controversial claims. Several studies dispute its historical claims of effectiveness. Never use as self-medication; medical advice is essential before any use.
- Marine mineral ampoules or isotonic solutions as dietary supplements: to be used as part of a balanced diet and only after consulting a doctor, especially in cases of underlying medical conditions.
- Saline solution: an isotonic saline solution intended for nasal, ocular, or skin hygiene; not intended for ingestion.
Always choose a regulated formulation that complies with health standards and is suitable for the intended use.
How can you use seawater in your daily routine?
Seawater can be incorporated into several wellness routines:
- Sea bathing: Enjoy the benefits of relaxation and improved microcirculation.
- Isotonic or hypertonic nasal spray: for daily nasal hygiene, especially during cold and allergy season.
- Facial lotion or mist: to refresh and tone the skin.
- Inhalation: as a complement to medical treatment, using an appropriate device and following professional advice.
- Mineral supplementation: in the form of appropriate dietary supplements, following medical advice in cases of medical conditions or pregnancy.
Are there any contraindications to the use of seawater?
Seawater is generally well tolerated, but several precautions should be taken:
- Very sensitive or irritated skin: Avoid prolonged exposure; a tightening sensation may occur.
- High blood pressure, kidney failure, low-sodium diet: internal use is strictly discouraged without medical advice (sodium intake).
- Pregnancy and breastfeeding: internal use (supplements, ampoules) only under medical supervision; external cosmetic use and nasal irrigation are generally safe.
- Infants: Use only specific pediatric nasal sprays, as directed by a healthcare professional.
- Perforated eardrum: strong nasal rinses are not recommended.
- Allergies to salt or trace minerals: Skin reactions are possible on very sensitive skin.
If in doubt, especially regarding internal or prolonged use, consult a healthcare professional (doctor, pharmacist, midwife).
