CHICAGO - JULY 10:  Marcus Owens relaxes in the Galos Caves salt cave July 10, 2008 in Chicago, Illinois. Sessions in the cave, which was made with Black Sea iodine salt, are purported to help with a host of medical issues including sinus and respiratory problems, allergies, and high blood pressure. Getty Images logo Getty Images 19 months ago

CHICAGO - JULY 10: Marcus Owens relaxes in the Galos Caves salt cave July 10, 2008 in Chicago, Illinois. Sessions in the cave, which was made with Black Sea iodine salt, are purported to help with a host of medical issues including sinus and respiratory problems, allergies, and high blood pressure.