Echinacea is widely touted for its immune-boosting properties and ability to help the body fight infection. Goldenseal is well-known for its antibacterial qualities and enhancement of white blood cells. Echinacea and goldenseal are commonly combined in products intended to boost the immune system. A herbal agent derived from one of 9 related plant species native to the US and southern Canada. The most common is Echinacea purpurea.