What is the primary use of Echinacea purpurea?

Echinacea purpurea is primarily known for its role in supporting the immune system, particularly in relation to upper respiratory infections. This herb is commonly used to help prevent or treat colds, flu, and other infections that affect the respiratory tract. The active compounds found in Echinacea are believed to stimulate the immune response, which can help reduce the severity and duration of these infections.

While there are other uses and benefits attributed to Echinacea, such as potential anti-inflammatory effects, its most significant application remains within the realm of enhancing immune function against respiratory and urinary tract infections. This distinction makes the identification of its primary use clear within the context of medicinal botany.