The antioxidant activity supports the medicinal use of lemongrass plant by local population. The flavonoid compounds of lemongrass plant leaves aqueous extract are responsible for its antioxidant activity. Flavonoid compounds in several aqueous extracts have strong antioxidant and free radical scavenging activities and are more effective in protecting cells from free radical damage. The phenolic compounds of lemongrass plant leaves extract contribute directly to antioxidant activity. These metabolites also act as radical scavengers, reducing