The respiratory system includes your mouth, nose, sinuses, throat, bronchial tubes and lungs. Besides helping you to breathe, the respiratory systems also allows you to talk, smell, deliver oxygen to the cells in your body, remove waste gases, and protect your airways from harmful substances and irritants. There are many inflammatory conditions that can affect the organs and tissues of the respiratory system. Studies show that certain vitamins, minerals, antioxidants and herbs can help to protect and enhance respiratory health.