Juniper oil is popularly used in steam inhalants for respiratory infections and congestion, as it can cut through phlegm and mucus, improving regular breathing. Juniper oil is also known as an immune booster, and can reduce inflammation and coughing. If you are suffering from bronchitis, it can often be difficult to recover, as the excess fluids being secreted in the respiratory tracts only makes the condition worse. Juniper oil can be easily found in health food stores and from herbalists; only a small amount is needed in a steam inhaler, as the oil is quite potent.