Sekem Flu herb is used to treat colds. This herbal supplement contains a group of plants such as common fennel, licorice, peppermint, guava, linden, common marjoram and hyssop. Common fennel is an aromatic plant that grows in the Mediterranean basin, and has a taste similar to anise. It is used to treat mouth infections, expel gas, in addition to treating coughs and digestive disorders.