Your liver works hard. It helps digest food, regulates cholesterol and fat metabolism and cleans the blood of impurities. It's no wonder dozens of dietary supplements claim to repair and regenerate this vital organ.
The most common type of echinacea in this country is known as purple coneflower, and its extracts have been used medicinally for centuries. It is a complex mix of chemicals, some of which may stimulate the immune system—for better or worse.