Often said to help ease stress and anxiety, lemon balm contains rosmarinic acid (a chemical compound with antioxidant properties). The herb is also used for insomnia, cold sores, high cholesterol, genital herpes, indigestion, and heartburn. In essential oil form, the scent of lemon balm is used to reduce stress This herbaceous perennial can reach a height of 60cm, it is a native of Europe, western Asia and northern Africa, but can be found growing all across the world. Its aromatic lush, green heart shaped leaves are slightly hairy with a toothed edge and crinkly texture, growing either side of the square stem. Small white flowers are 2-lipped and grow in whorled clusters. Boil and infuse before use.