Eucalyptus leaves are a great source of antioxidants, particularly flavonoids. Eucalyptus is widely used as a natural cold remedy and is a common ingredient in cold and cough products. Eucalyptus is also widely believed to decrease symptoms of stress. Researchers believe that it decreases the activity of your sympathetic nervous system — your stress response system — and increases the activity of your parasympathetic nervous system, which promotes relaxation.
Tea sommelier's tip: Mix a dash of honey for a serene cleansing treat.