Here's the truth behind Himalayan salt lamps. For centuries, people have known the ability of salt rock crystals to improve air quality. When the bulb heats the salt, it releases negative ions into the air. These ions help freshen the air and increase your oxygen intake. This study exposed rats to salt lamps for 14 weeks. The results showed increased brain tryptophan, mimicking antidepressant effects, and improved mood. The Himalayan salt lamp also acts as a natural air purifier because negative