Vetiver oil, also known as khus oil, is a dark brown, thick essential oil extracted from the roots of the vetiver plant (Vetiveria zizanioides). The oil has a strong, earthy, and musky aroma and is used in perfumery, aromatherapy, and traditional medicine. It is known for its grounding and calming properties and is said to help with anxiety, stress, and insomnia. Vetiver oil is also used in skincare products for its anti-inflammatory and soothing properties. It is considered non-toxic and non-irritant, but should be used in dilution with a carrier oil and avoided during pregnancy.