FUNCTION: Improves sinus health and helps to prevent and eliminate sinus congestion. Also assists with sinus related headachesdue to pressure buildup in the sinus cavities. This formula helps keep the nasal passages and sinus cavities unobstructed with mucus, eliminating other fluids that can build up and cause pressure and excruciating pain in the head. The unique supplement of natural herbs contains all the ingredients necessary to promote and protect the health of your sinus cavity.