Essential oils are volatile liquids that are distilled from plants, seeds, bark, leaves, stems, roots, flowers, and fruit. Essential oils have a unique lipid-solution structure. They diffuse into the bloodstream through cell membranes. The same way that the active ingredients in hormone or nicotine patches do. The human blood and essential oils of plants have several common properties. They fight infection, contain hormone-like compounds and initiate regeneration. Essential oils contain antibacterial, antifungal, and antiviral properties. The ability of some essential oils to work as hormones helps to bring balance to many systems of the human body. The lipid soluble structure of essential oils is similar to our cell membranes. They easily penetrate the cells because the molecules of the oils are small. Applied topically to the body they can travel through the body in just minutes.