Nature's Alchemy, Vetivert, Essential Oil, .5 oz (15 ml)Vetiveria Zizanioides 100% Pure These 100% natural essential oils are meticulously extracted from plants by cold pressing or steam distillation using the same techniques developed by the medieval Persian physician Avicenna. All Natures Alchemy high quality botanical oils are scientifically tested for purity and contain no chemical solvents, added alcohol or other extenders.