Admittedly, the negative ion claim didn’t come out of nowhere. There was a 1998 study published in the journal of the American Psychological Association, and a few follow-up studies as well, that suggested negative ions could help reduce the effects of seasonal affective disorder and chronic depression. But the reality is there aren’t any studies suggesting the lamps provide anywhere near the levels of negative ions to have an effect, and when Negative Ions Information Center tested salt lamps for negative ion output, they found so few it was hard to measure. http://www.holisticproductsireland.com/image/cache/data/Salt%20lamps/81IY66qnJ5L._SL1500_-700x700.jpg
A few isolated studies have shown modest and equivocal effects from negative ionization. For instance, in 1981, researchers at the University of Surrey in England looked at the incidence of stuffiness, nausea, dizziness and headaches in people in an office environment. They found office air had fewer negative ions than is typical outside. So the team conducted a double-blind study and found that the reintroduction of ions reduced the incidence of these symptoms over a 12-week period. The findings were published in the Journal of Environmental Psychology. A 1993 study published in the Journal of Human Ergonomics found that negative ions could slightly affect people's circadian rhythms, although they had no impact on anxiety or exercise levels.
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No consistent influence of positive or negative air ionization on anxiety, mood, relaxation, sleep, and personal comfort measures was observed. Negative air ionization was associated with lower depression scores particularly at the highest exposure level. Future research is needed to evaluate the biological plausibility of this association. Source: Air ions and mood outcomes: a review and meta-analysis.   https://purepinksalt.com/wp-content/uploads/2017/08/Elora-other-lamp-Edited.png

Very simply, an ion is an atom or molecule that has gained or lost an electron. Both positive and negative ions exist in the air: positive air ions are generally molecules of carbon dioxide that have lost an electron, whereas a negative air ion is generally a molecule of oxygen that has gained an electron. Negative ions in the air attract particles of pollution and give them a negative charge, making them seek an electrical “ground,” and causing them to fall harmlessly to the floor. It stands to reason that we want to be surrounded by negative ions as a way of protecting our health.
Himalayan salt lamps are made from large rock crystals of salt mined in Pakistan and India in the vicinity of the Himalayas. The crystals are usually orange or pink but can range from off-white to dark brown. Carved into lamps, they can be lit from within using a light bulb or candle. These give out an attractive, soothing light and have been credited with providing various health benefits including the elimination of the “electro-smog” you mention. Retailers also tout their production of “positive energy” in the form of negative ions that supposedly bring oxygen to the brain, reduce indoor pollution, boost the immune system and cure seasonal affective disorder (SAD).
Another possible health benefit of the Himalayan salt lamp is a reduction in anxiety symptoms. According to color therapy as well as general human enjoyment, the warm pinkish to orange glow of the salt lamp is a calming and happy presence in a room. Additionally, as a real piece of nature, Himalayan salt gives off negative ions like a waterfall (but in much smaller amounts). Since Himalayan salt lamps release negative ions into the air, they can help reduce anxiety and also encourage a relaxing atmosphere for sleep. (7) Many people like to keep salt lamps in their bedrooms for their calming effect. http://www.steroidsmag.com/wp-content/uploads/2018/01/Benefits-Of-Himalayan-Salt-Lamp.png
Katie Wells, CTNC, MCHC, Founder and CEO of Wellness Mama, has a background in research, journalism, and nutrition. As a mom of six, she turned to research and took health into her own hands to find answers to her health problems. WellnessMama.com is the culmination of her thousands of hours of research and all posts are medically reviewed and verified by the Wellness Mama research team. Katie is also the author of the bestselling books The Wellness Mama Cookbook and The Wellness Mama 5-Step Lifestyle Detox. https://www.topportalreview.com/wp-content/uploads/2015/10/Airblasters-7-8LB-Cross-model-Himalayan-Salt-Lamp-300x300.jpg
An awesome way to increase exposure to negative ions is to spend more time in nature, especially around water. Himalayan salt lamps are said to emit negative ions in small amounts and cancel out positive ones. By neutralizing electromagnetic radiation, they may help reduce the negative health effects of harmful electrosmog. Balancing positive and negative ions also may help reduce airborne infections. (4) https://2.bp.blogspot.com/-KwBASHzB9Ps/WDRZDGbgB7I/AAAAAAAAO5I/k2culTj7muQzHepghUEJxuE_0JNmh__lgCLcB/s1600/Benefits%2Bof%2BSalt%2BLamps%2B%25282%2529.png
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Salt is hygroscopic, which means it absorbs water. This is why Himalayan pink salt crystals start to melt with prolonged exposure to high humidity. Thus, you should keep them away from household moisture sources like showers, dishwashers and laundry washing machines. It can be dangerous if the salt begins leaking onto the lamp holder. To avoid buying a substandard lamp holder, purchase a salt lamp that’s firmly connected to the base. It’s also ideal to find a salt lamp that has UL certification, which is an extra measure of safety assurance. (11) http://www.natural-salt-lamps.com/wp-content/uploads/usblampweb.jpg
They cut the bottom to make it flat and drill a hole to make space to fit lighting instruments. These instruments not only provide light but also heat that helps spread and evaporate the salt into the air. It is believed that once it is heated, it is capable of capturing all the impurities present in the area, as well as spreading negative ions which are known to be beneficial to us.
Himalayan rock salt itself can reduce cholesterol and blood pressure, and contains 84 trace minerals essential to your health. Also, Himalayan salt regulates the water content in your body, promotes a healthy pH, regulates sleep, helps to keep your bones strong, and much more. Therefore, it should come as no surprise that Himalayan salt lamps also have numerous health benefits. https://thesaltmystery.com/wp-content/uploads/2016/05/WBM-Himalayan-salt-lamps.png
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