Deep-sea seawater is extracted from impurities by professional equipment, and the physiological seawater nasal spray has been used in Europe and the United States for more than 40 years. Most of the salt manufacturers are from Europe, and they like to advertise the naturalness of the waters they take from. In fact, the quality of physiological seawater has little to do with the sea area of water intake, but lies in the production and canning technology, how to purify and sterilize is a difficult problem, and there are not many enterprises that have mastered this technology in China.

Sold by Delmar from France, the world's leading supplier of spray nasal irrigation devices, was introduced by Jointown International in 2014 and became very popular in the Chinese market, with its iconic "Little Dolphin" nasal spray for children being well known to the public. Although it only produces nasal sprays, Solmar has the most extensive segments, including the basic Breathe easy daily (for children and adults over 3 years old) and nose hygiene (for children and adults) for rhinitis patients, as well as the Blocked nose for nasal congestion and runny nose (for children and adults), and the Sensitive nose for nasal soothing (for children/adults over 6 months old).

There are many differences in the names of the products, but the composition of the basic spray solution is 100% physiological seawater, while the "nasal congestion" is hypertonic seawater with increased copper and magnesium salt content, and the "soothing" model is added with sulfur. The concentration of sodium chloride in both normal saline and normal seawater is 0.9%, which is not exactly the same as human tissue fluid, but the osmotic pressure is similar, and it is used to flush the nasal cavity without causing damage to the tissue mucosa. The concentration of hypertonic seawater is generally 2%, although it can relieve nasal symptoms faster, but due to the higher concentration, the nasal cavity is prone to burning discomfort, so it is more recommended to buy basic models for daily care, and it is better to see a doctor during an acute attack.

Which is better, saline or saline, has always been a point of contention between rinse nasal irrigation device manufacturers and spray nasal irrigation device manufacturers. A 50ml bottle of physiological seawater nasal spray is often sold for about 60 yuan, which is much higher than a few hundred milliliters of normal saline. At present, there is no reliable clinical research to show that the use of natural sea salt is better than normal saline, the purpose of nasal lavage is to remove nasal dirt, rather than superstitious belief that seawater spray is "rich in a variety of trace elements can cure diseases", it is better to say that its biggest advantage is mild and comfortable, easy to operate, and babies and children do not resist the use.