We are manufacturer and exporters of himalayan rock salt items
Natural living afficionados boast that the core benefit of these lamps is “their incredible power to remove pollen, dust, cigarette smoke, and other contaminants from the air”.
And even though devotees admit “it’s just a big chunk of salt with a light bulb inside” they claim that their efficacy stems from hygroscopy, attracting and absorbing water molecules with contaminants inside, from the surrounding environment, trapping them into the salt crystal.
It is absolutely true that the salt lamps are hygroscopic: they do suck water vapor from the air. Salt in the air has long been seen as a health booster, and sea air has been proven to help clear the airways.
There is ample scientific evidence of the health benefits of breathing salty air. However, rock salt isn’t particularly effective at spreading salt particles through the air.
There are ‘salt spas’ around Europe, which people visit for help with their respiratory problems, but these are rooms lined with blocks of salt like mosaic tiling. It seems unlikely that a 10-inch lamp would affect the air of the whole room.