May Chang Essential Oil has a sharp, complex lemony aroma. It may help to open up the bronchial passages for those suffering from bronchitis, allergies, asthma and other chest ailments. In traditional Chinese medicine, May Chang sometimes blends with other medicines in throat gargles. Chinese physicians also use May Chang oil to help regulate blood pressure and heart rate. It may also be beneficial for acne and indigestion. 100% Certified Organic