Ionization and Salt Lamps

Ionizing machines emit negative electric charges into the air, and this supposedly causes airborne allergens to cluster and fall to the ground. These machines have been claimed to help hay fever and asthma sufferers by decreasing the allergen load on the nasal mucosa and lungs.

Speleotherapy is carried out in salt mines where there are large concentrations of healthy ions. These are the same ions that are given off by salt lamps.

Many people, who can't go to the salt mines, use salt crystal lamps to create those ions. They buy salt crystal lamps made from the same salt mines used the speleotherapic clinics. These lamps are reported to provide relief the same was people are relieved at the salt mines.