Natures Way Echinacea Purpurea Herb 400 mg Capsules For Immune SupportIt has been clinically shown to support the immune system. It contains copper, iron, vitamin C, iodine, vitamin E, potassium, vitamin A, sulphur, and many other nutrients which all help support the immune system. Echinacea Herb Helps General well-being During The Cold & Flu Season Echinacea (Echinacea Purpurea) helps promote general well-being during the cold and flu season. Echinacea grows wild in the Midwest, and was used by plains Indians more than any other herb. Today Echinacea is the best known herb available. It has received positive reviews from doctors on national television. In Germany, it is one of the most researched herbs available. Its benefits have been shown in many European research clinics. Nature's Way Echinacea Purpurea is organically grown by trout lake farm, Washington, and certified organically processed in accordance with Oregon tilth standards and the California organic foods act of 1990.