Salt Lamps

Some people say they feel more refreshed and clear-headed after a storm, a feeling they believe is due to the amount of negative ions in the air. Commercial ionizers and purification systems also produce negatively charged ions to create cleaner and more comfortable indoor spaces.

Himalayan salt lamps supposedly produce negatively charged ions while water molecules from the air attract to — and then evaporate from — the warmth of its surface. Those who believe in the health benefits of these lamps give negative ions much of the credit.