Unique combination of 5 extracts of selected plants made by a Swiss scientific team. Cistus creticus, sage, purple echinacea, citrus bioflavonoids, and Barbados cherry. Enhance the effect of others and the extras under the polyphenols and bioflavonoids group that mechanically obstructs virus binding sites. Creates a protective film on the mucous membrane to prevent penetration. cistus creticus is a plant known for its high content of polyphenols. Acts as a natural antioxidant (neutralizes free radicals) echinacea purpurea has a beneficial effect on the respiratory system, supports the normal function of the upper respiratory tract