Now a staple of health-food stores, lemongrass (cymbopogon citrates) has a long history as a flavoring in Asian cooking. This native of India and southern Asia is a tall perennial grass with fragrant, sword-like leaves that repel most insects but attract honeybees. Healers have used it to ease stomach pain, spasms, coughs, body aches, and fatigue. Studies show that lemongrass offers high levels of antioxidants and can aid digestion, lower high blood pressure, boost metabolism, burn fat, act as a tonic for skin and hair, and relieves menstrual pain. It is rich in vitamins B1, B5, and B6; in folic acid; and in the minerals potassium, zinc, calcium, iron, manganese, copper, and magnesium.