Aromatherapy is the use of organic essences of aromatic plants for healing and the maintenance of vitality.The essences,

or `essential oils` as they are commonly known, are extracted from a wide variety of plants, and are very concentrated.

For example it takes the petals from about 30 specially cultivated roses to produce one drop of rose essential oil and several kilos of lavender to produce a small bottle of essential oil. 

Each oil has it`s own unique healing properties and fragrance. One essential oil may contain over one hundred different chemical constituents:

REFERENCE:Aromatherapy Guidelines