BellaSkin's Collection - Essential oils - are the volatile liquids that are distilled from plants ( including their respective parts such as seeds, barks, leaves, stems, flowers, etc.) One of the factors that determines the purity and the therapeutic value of an oil is its chemical constituents. These constituents can be affected by the vast number of variables including : the part(s) of the plant from which the oil was produced, soil, condition, fertilizer ( organic or chemical), geographical, region, climate, altitude, harvest season and the methods, and distillation process. BellaSkins Collection - therapeutic essential oils blends - we understand the power of essential oils in the realm of personal, holistic health care, we comprehend the absolute necessity for obtaining the purest therapeutic-grade essential oils possible. No matter how costly pure therapeutic-grade essential oils may be, there can be no substitutes.