iFlora™ Nasal Health is a clinically-proven, patent-pending formula combining the power of probiotics and the sinus support of NAC for nasal and bronchial health.* Swiss researchers discovered that this specific probiotic formula featuring 22 billion cells** per serving maintains healthy levels of flora in nasal sinuses. Maintaining healthy levels of nasal flora supports a healthy immune response and crowds out undesirable invaders.* NAC is added to provide a powerful all-natural detoxifier and antioxidant to support production of healthy mucus in the sinuses and bronchials, supporting upper respiratory health.* NAC is also the precursor of the body's most important natural antioxidant, glutathione, which helps maintain immune, cellular and respiratory health.* Take iFlora™ Nasal Health daily or seasonally to support sinus and bronchial health.* 90 Vegetarian Capsules