ALL NATURALS ESSENTIAL OILS PURITY PROMISE: We work very hard to source our essential oils only from farms that have their own distilleries to ensure that aroma and medical properties are retained during distillation. Each new variety is randomly tested for 3 months by perfumers aromatherapists massage/beauty practitioners random customers and in the lab for aroma quality & consistency before launch. We do not use any chemical fixatives to enhance the aroma. Each oil is 100% pure & therapeutic grade.