Echinacea (purple coneflower) is a native American herb that was once widely used by the Plains Indians and is now used by millions of consumers worldwide. Our Premium Echinacea is standardized to a minimum of 4% Echinacosides, an active measurable component in Echinacea. We add synergistic Echinacea purpurea Root to complement the standardized Echinacea.Contains no sugar, salt, preservatives, yeast, wheat, gluten, corn, soy, or milk In addition to these capsules, NOW® also sells Echinacea powder, Echinacea liquid extract , and Echinacea/Goldenseal capsules and liquid extract. Our entire line of herbal products are high-quality non-irradiated and purchased from reliable sources around the world. Caution: For adults only.