Cymbopogon citratus Known as Lemon Grass

 Cymbopogon citratus, Known as Lemon Grass

Lemon Grass or Cymbopogon citratus, commonly known as Serai or Sereh In Indonesian,  Lemon Grass  or oil grass is a tropical plant from South Asia and Southeast Asia. Serai is often sold in stem form. While it can be grown in warmer temperate regions, such as the UK, it is not hardy to frost.

Oil Grass is abundant in the Philippines and Indonesia where it is known as Tanglad, Serai or Sereh. Its fragrant leaves are traditionally used in cooking, particularly for Lechon and Roasted chicken.

The dried leaves can also be brewed into a tea, either alone or as a flavoring in other teas, imparting a flavor reminiscent of lemon juice but with a mild sweetness without significant sourness or tartness.

Herbal supplements and teas from the leaves of Cymbopogon citratus have ben used in traditional medicine.
Many effects have been attributed to both their oral consumption and topical use, with modern research supporting many of their alleged benefits. In Brazil, it is believed to have anxiolytic, hypnotic, and anticonvulsant properties In traditional medicine.

In India traditional medicine, the leaves of the plant are used as stimulant, sudorific, antiperiodic, and anticatarrhal, while the essential oil is used as carminative, depressant, analgesic, antipyretic, antibacterial, and antifungal agent.

Laboratory studies have shown cytoprotective, antioxidant, and anti-inflammatory properties in vitro,as  well as antifungal properties}} (though Cymbopogon martinii was found to be more effective in that study).

Citronellol is an essential oil constituent from Cymbopogon citratus, Cymbopogon winterianus, and Lippia alba. Citronellol has been shown to lower blood pressure in rats by a direct effect on the vascular smooth muscle leading to vasodilation. In a small, randomized, controlled trial, an infusion made from C. citratus was used as an inexpensive remedy for the treatment of oral thrush in HIV/AIDS patients.

Lemon grass oil contains 65-85% citral in addition to myrcene, citronella, citronellol, and geraniol. Hydrosteam distillation, condensation, and cooling can be used to separate the oil from the water. The hydrosol, as a by-product of the distillation process, is used for the production of skin care products such as lotions, creams, and facial cleansers. The main ingredients in these products are lemon grass oil and "negros oil" (mixture of lemon grass oil with virgin coconut oil) used in aromatherapy.