
Professional scavenger and antimicrobial substances are naturally present in the secretion lining of the lungs. Mucus is essential to maintaining lung health. Only 10 milliliters, or 2 teaspoons, reaches the back of the throat throughout the day and is inadvertently swallowed. Most of this is reabsorbed into the bronchial lining.

A healthy person produces up to 100 milliliters of mucus every 24 hours. Mucus is mostly water (95%) mixed with proteins, carbohydrates and lipids. The lungs respond to inhaled irritants by increasing the production of mucus. Mucus is a gel substance naturally secreted by the lungs’ cells and glands that lines the surface of airways.
