Echinacea (Leaf, stalk, root)

Echinacea is most often used to treat or prevent colds, flu, and infections, and for wound healing. Many studies have looked at how well it works to prevent or shorten a cold. The results have not been clear. Some studies do show some benefit of echinacea to help with upper respiratory infections.

Studies have shown that long-term use can affect the body's immune system. Because of this, only short-term use is advised. Check with your healthcare provider about any interactions with other medicines that you take. People allergic to plants in the daisy family may have an allergic reaction to echinacea. The daisy family includes ragweed, chrysanthemums, marigolds, and daisies.