Himalayan salt lamps are crystals carved from amber-colored rock salt, hollowed out to fit a lightbulb inside. When you light them they give out a warm, reddish-pink glow.
Sellers of these decorative pieces say they do more than light up a room. They claim the lamps can boost mood, improve sleep, ease allergies, help people with asthma breathe better, and clean the air, among other benefits.
- The claims sound impressive. Yet the scientific evidence to back them up is scarce.