May Chang Essential Oil has a fresh, sweet citrus fruity fragrance, and uplifting qualities. May Chang Essential Oil uses and benefits: Skin & Hair: Useful in the treatment of oily acne prone skin because of its astringent and tonic effect on the skin. Body: Known as a tonic of the heart and respiratory system and can also be helpful in cases of bronchitis and asthma. Mind & Emotions: Very uplifting and stimulating.