FLORASSIST® Immune & Nasal Defense combines a whole food fermentate from baker’s yeast with immune health probiotic strain L. rhamnosus CRL1505 to promote a healthy immune response to challenges. This formula supports immune health by encouraging the production of immune compounds like secretory IgA and natural killer cells. It also helps maintain optimal nasal airflow in response to harmless things in the environment like pollen. Non-GMO gluten-free vegetarian and manufactured in the USA.