Bio3 Echinacea 80 Capsules. Bio3 offers a natural product Echinacea, traditionally used for their properties to enhance the body's defenses, especially to prevent and treat minor ailments such as colds and respiratory catarrh. A healthy and strong immune system is the most effective natural way to avoid infection. Echinacea purpurea have immune stimulating properties to prevent the common cold and flu states. Your prophylaxis reduces the duration and severity of them