Echinacea purpurea extract is a type of extract obtained from the root, leaves or flowers of the Echinacea purpurea plant. Various components of the Echinacea purpurea plant, especially polysaccharides and flavonoids, may be responsible for the pharmacological effects of this extract. Echinacea purpurea extract may have immune-supporting properties. Some research shows that this extract may protect the body against infections such as colds and flu. It may have antioxidant properties. This property may support overall health by protecting cells from the damaging effects of free radicals.