• What does seawater do?
  • Seawater naturally contains water and salt, like all fluids in our body. However, the salt concentration is naturally higher in seawater. To make it tolerable, we reduce the salt concentration until we attain a concentration identical to that of our body (isotonic) or greater (hypertonic). Moreover, seawater naturally contains mineral salts and dietary-minerals which help make our body stronger, especially during demanding periods including winter and the flowering season.

  • Does using isotonic seawater daily have a harmful effect on the nose and nasal flora?
  • Daily use can only have a beneficial effect on the nasal mucosa, especially if you are confronted with external attackers on a daily basis (such as cold, pollution and allergens). However, you must observe the dose stated on the product instructions.

  • What is the difference between isotonic and hypertonic?
  • Our body's cells have a natural salt concentration of 0.9%. An isotonic solution will have the same concentration. A hypertonic solution has a salt concentration higher than that of our cells (2.2% for MARIMER® solution). Applying it will have an osmotic effect. Evidence shows that cells will liberate water and more easily discharge mucus which has accumulated on the surface of the nasal mucosa. Hence, hypertonic solution is only prescribed for a blocked nose, whilst isotonic solution may be used daily for preventive nasal hygiene.

  • Is the seawater used not polluted?
  • Every precaution is taken to ensure optimum quality water. The seawater is taken from an area known for the quality of its waters, somewhere where oysters are bred. The water is also taken from a depth of a few metres, whereas pollutants float to the surface. The water is tested regularly. The seawater will then be filtered, so that only salts and dietary-elements (elements that are smaller than living organisms) are kept. Finally, the water is tracked at each stage of the process, until it is packaged in a completely sterile environment.

    Using Marimer sprays

  • What is microdiffusion?
  • The system means that the solution may be applied to the nasal cavity and diffused gently. Seawater solution droplets thus adhere better to the surface of the nasal mucosa.

  • Can the nozzle be used on anyone else?
  • Yes, provided that the nozzle is cleaned each time it is used. It would be ideal to have one product for each family member, especially during periods when everyone has "the sniffles".

  • Do you have to swallow or wipe your nose?
  • Even though the stomach is naturally capable of eliminating anything which can be swallowed, it is preferable and much more comfortable to wipe your nose to discharge excess product and residue. For infants, we recommend using a baby nasal aspirator.

  • How long can you keep Marimer® sprays once they have been opened?
  • The pocket valve system means that they may be kept from the first time they are used until the expiry date (or 3 years after manufacture). The valve prevents any product contamination. We do of course recommend cleaning the dish and the nozzle regularly.

  • When should a single dose rather than a spray be used and vice versa?
  • Either as a spray or a single dose, the solution will have the same qualities and the same properties. The spray is distinctive because of its microdiffusion and single dose thanks to its ease of use. However, some mothers prefer to use a single dose in their baby's first few days.

    Blocked Nose - Cold

  • What should I take for a blocked nose?
  • We would advise using Marimer Blocked Nose - Cold - Post-operative Care.


  • What should I take for hay fever?
  • Depending on the case, a doctor may suggest an allergen injection with controlled doses once a week, a solution to be placed under the tongue every morning or a capsule to be dissolved under the tongue. Several years of treatment are often necessary.

    Ask your questions