Standardized herbal extract. 100% Vegetarian formula. Maximum strength formula to increase the body's natural defenses during cold & flu season. 21st Century's Echinacea Extract combines the potent benefits of both Echinacea purpurea and Echinacea angustifolia standardized to contain 4% Phenolic compounds and 4% Echinacosides, respectively. Echinacea is legendary for its natural defense during the cold and flu season. 21st Century's standardized herbal extracts are thoroughly tested to assure specific levels of the important active ingredients are present for maximum benefit. For your health: No sugar, salt, yeast preservatives, artificial flavors or colors. (This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.)