Native Americans and other indigenous peoples have burned sage for centuries as part of a spiritual ritual to cleanse a person or space, and to promote healing and wisdom. It's been used since the time of the ancient Egyptians and Romans to treat digestive issues, memory problems, and sore throats.
Scientists have observed that sage can clear up to 94 percent of airborne bacteria in a space and disinfect the air. When sage is burned, it releases negative ions, which is linked to putting people into a positive mood. The Latin word for sage salvia stems form the word heal.