Salt Crystal Lamps are made from natural salt crystals formed by nature and mined from the Himalayas. Salt Crystal Lamps emit negative ions into the surrounding air. They are a natural ionizer. The negative ions of the salt lamp neutralize positive ions caused by cars, dust pollution and cigarette smoke. Microwaves, TV’s and computers also emit these positive ions. The negative ions give the air freshness similar to waterfalls or the air you feel after a thunderstorm. Salt Crystal Lamps are used to help relief headaches, allergies, asthma and other respiratory problems. The plentiful negative ions neutralize the potential harmful positive ions causing the air to achieve an electrical balance..