Because if unchecked it may lead directly to consumption. Catarrh is caused by impure blood. This fact is fully established. Therefore, it is useless to try to cure catarrh by outward applications or inhalante. The true way to cure catarrh is to purify the blood. Ilood's Sarsaparilla, the great blood purifier, cures catarrh by its power to drive out all impurities f rom the blood. Thousands of people testif y that they have been perfectly and permanently cured] of catarrh by Ilood's Sarsaparilla.