Provides Immediate Support for Sinus and Respiratory Challenges. Aids in Breakdown and Clearance of Mucus. Helps Soothe Sinus Tissue. Boosts Immune Response. Optimal sinus health requires adequate mucus flow and clearance throughout the nasal cavities. The sinuses are hollow cavities branching from the nasal passages. While the nasal passages are often colonized with bacteria, the sinuses are typically sterile under healthy conditions. The sinuses and nasal passages are lined with soft tissue, called mucosa, that feature thin, hair-like projections called cilia. Specialized cells of the mucosal tissue, known as goblet cells, secrete a thin layer of mucus to absorb microbes and allergens, such as dust, dirt, pollen, and mold, inhaled through the nose. Working together, cilia “beat” to move mucus and waste out of the sinuses and nasal passages. Upper respiratory challenges may impair this process, known as mucociliary clearance, and contribute to fluid entrapment within the sinus cavities. Sinatrol contains a synergistic blend of nutrients and botanical ingredients to quickly boost immune response, decrease mucus build-up and increase mucociliary clearance during upper respiratory challenges. . Resale of Professional Grade Supplements are not allowed. All Professional Grade Supplements are tracked by lot number. Anyone caught or suspected of reselling these products will have their accounts terminated at our discretion. A $25 restocking fee will apply to all returns of Professional Grade Supplements. Check of the expiration date listed in the product description is the responsibility of the customer. Any products discounted for sale prices are FINAL SALE and no returns will be allowed.