Essential Oils are highly concentrated aromatic extracts that come from cold-pressing or stem-distilling plants.  These extracts come from grasses, leaves, flowers, fruit peels, wood and roots.  It takes 200 pounds of lemon peel or 1500 lemons to make 1 pound of lemon essential oil.  Each aroma has a specific therapeutic effect such as relaxing, stimulating, immune boosting, releiving congestion, or soothing muscular aches and pains.  Essential oils can be used in many different ways.  One of the most popular ways is with aromatherapy diffuser.  It is also used in massage oils, in bath water, in lotions, and many other ways.