This extract from two species of Echinacea (Echinacea angustifolia and Echinacea purpurea) contains powerful flavonoids and other constituents that promote a healthy immune system response. 

Echinacea root (Echinacea angustifolia): Echinacea root is used to strengthen the immune system and is best used short-term at the onset of symptoms. Large amounts of Alkylamides in the roots may support a healthy inflammatory response in the sinuses.

Echinacea flower (Echinacea purpurea): The flowers of echinacea contain Arabinogalactin Proteins and Polysaccharides. These chemicals support a healthy functioning immune system and are best-used long-term for support.