For centuries, alternative herbal medicines have been used to treat common colds, flu, allergies, and other respiratory problems. Usually from plant extracts, they are also designed to strengthen the respiratory system and help the body resist bacteria and viruses that may invade the lungs and other respiratory organs. Before, these plant extracts are not readily available as some of them are rare and must be prepared for use. Now, almost all the kinds of herbal supplements are available in convenient packages, especially those with proven respiratory benefits. Respiratory food supplements are the cheaper and safer solution for nasal congestion, wheezes, cough, sneezing, and other respiratory symptoms.