Essential oils are the most powerful part of the plant.  They repair the plant when it is attacked.  In the body they have access to the limbic lobe of the brain.  That limbic lobe controls heart rate, breathing, memory, hormones, stress levels & more.  Oils are tiny-smaller than viruses.  They hit your cells in 3 seconds when inhaled & 26 seconds when applied topically.  Oils have no YUCK! They are just the distilled plant in steam form.  They have millions of uses such as: supporting systems in the human body like the cardiovascular system or the endocrine system (hormones), your joints, brain & liver.  They are used to replace chemical cleaners.  Thieves cleaner is all I use to clean everything.  It's made of plants & 5 oils: Clove, Eucalyptus, Rosemary, Cinnamon & Lemon.  You can use oils to replace your personal care products.  YL oils are organic.  Last time I googled dangers of artificial scents it said, "causes cancer".  YL living has an entire line of personal care products that are completely chemical free. Consider kicking out your chemicals!  Thieves Cleaner dilutes 30 to 1 costs me 5 cents an oz wholesale.  What happened when I started using it?  My roommates left (ants&roaches).