Absolute Aromas Lemongrass Essential Oil. Buy essential oils online Ireland. Absolute Aromas Lemongrass Oil can be very refreshing and relaxing and is commonly used as an insect repellent. It has a fresh, clean, citrus aroma and its oil is yellow to amber in colour. Lemongrass oil helps to revive a tired mind and is a great tonic to revitalise the body.. Lemongrass essential oil benefits:. Antibacterial. Antifungal. Anti-inflammatory. Antispasmodic. Astringent. Digestive stimulant. Insecticide. Lemongrass Oil for diffuser.