Mildly diuretic and a stimulant tonic. The herb promotes digestion of fats, and in Ayurvedic medicine a preparation of lemon grass with pepper has been used for relief of menstrual troubles and nausea. The herb stimulates perspiration, cooling the body in summer and lowering fevers any time of year. Lemon grass is well known a mild insect repellent (citronella) and the essential oil is used in perfumery. A study in 1988 found significant antimicrobial activity in fighting several human pathogens such as E.coli and staphylococcus aureus. It has also been used externally for treatment of lice, ringworm, and scabies. Precautions Take care to store lemon grass away from other foods and spices, as they make pick up its aroma. Soak dried whole lemon grass for two hours in warm water before using in cooking. It medicinal application in excessive doses should be avoided while pregnant.