Aroma therapy, commonly associated with complementary and alternative medicine (CAM), is the use of volatile liquid plant materials, known as essential oils (EOs), and other aromatic compounds from plants to affect someone's mood or health. The word was coined in the 1920s by French chemist René Maurice Gattefosse, who devoted his life to researching the healing properties of essential oils after a lucky accident in his perfume laboratory. (In the accident, he lit his arm on fire and thrust it into the nearest cold liquid, which happened to be a vat of lavender oil. Much to his amazement, the burn quickly healed without a scar.)

The main branches of aromatherapy include:

Home aromatherapy (self treatment, perfume & cosmetic use)
Clinical aromatherapy (as part of pharmacology and pharmacotherapy)
Aromachology (the psychology of odors and their effects on the mind)

Theory
When aromatherapy is used for the treatment or prevention of disease, a precise knowledge of the bioactivity and synergy of the essential oils used, knowledge of the dosage and duration of application, as well as, naturally, a medical diagnosis, are required. In the Anglo-Saxon world, even among "natural" practitioners like herbalists or naturopaths, aromatherapy is regarded more as an art form than a valid healing science.

At best, it is viewed as a complementary and seldom the only treatment prescribed. On the continent, especially in France, where it originated, aromatherapy is incorporated into mainstream medicine. There, the use of the anti-septic properties of oils in the control of infections is emphasized over the more "touchy feely" approaches familiar to English speakers. In France some essential oils are regulated as prescription drugs, and thus administered by a physician. In many countries they are included in the national pharmacopeia, but up to the present moment aromatherapy as science has never been recognized as a valid branch of medicine in the United States, Russia or Germany.

Essential oils, phytoncides and other natural VOCs work in different ways. At the scent level they activate the limbic system and emotional centers of the brain. When applied to the skin (commonly in form of "massage oils" i.e. 1-10% solutions of EO in carrier oil) they activate thermal receptors, and kill microbes and fungi. Internal application of essential oil preparations (mainly in pharmacological drugs; generally not recommended for home use apart from dilution - 1-5% in fats or mineral oils, or hydrosoles) may stimulate the immune system, urine secretion, may have antiseptic activity etc. Different essential oils have very different activity; they are studied in pharmacology and aromachology.

It is significant to note the concept of chemotype in essential oil chemistry. Eucalyptus, for example, has many species, such as Eucalyptus globulus (main component is 1,8 cineole), Eucalyptus citriodora (citral), Eucalyptus menthol, and others. Properties of the essential oils of the same generic (common) name are not all the same; they can differ widely in their chemical components and in their therapeutic actions. Likewise, their chemical makeup depends on the method of extraction (e.g. pressed and distilled bergamot oil have different uses). The practitioner must be aware of these factors.

Application
While the practice of aromatherapy is sometimes thought to be confined to inhalation, it may include various methods, including:

Inhalation (directly or diffused into the air)
Absorption through the skin (baths, massages, compresses)
Absorption through the mucous membranes (oral rinses and gargles)
Ingestion (occasionally prescribed, with caveats)

Therapeutic Effects
Aromatherapy is based mainly on the following therapeutic effects:

Antiseptic effects: viricidial, bactericidal, fungicidal
Anesthetic action (menthol, camphor)
Central nervous system effects
Metabolic / Endocrine effects
Psychological effectsImmunostimulator
Fragrances can have a relaxing effect measured as an increase in alpha brain waves.

One of the best known essential oils for aromatherapy is lavender, which is recommended by practitioners for treating wounds, to enhance memory, and to aid sleep by combating anxiety and insomnia. Other popular scents include eucalyptus, rose, jasmine and bergamot.

Aromatherapy is among the fastest growing fields in alternative and holistic medicine. Aromatherapy is sometimes used in clinics and hospitals for treatment of pain relief, for labor pain, for relieving pain caused by the side effects of the chemotherapy, and for the rehabilitation of cardiac patients.

Criticism
Skeptics argue that while pleasant scents can be relaxing, lowering stress and related effects, there is currently insufficient scientific proof of the effectiveness of aromatherapy. Like many alternative therapies, few controlled, double-blind studies have been carried out - a common explanation is that there is little incentive to do so if the results of the studies are not patentable.

There are some treatments generally accepted in Western medicine to give a form of relief for the airways in case of cold or flu, such as mint and eucalyptus essential oils. Skeptical literature often depicts aromatherapy as based on anecdotal evidence of its benefits rather than proof that aromatherapy can cure diseases. Some skeptics acknowledge that aromatherapy has limited scientific support but argue that its claims go beyond the data or that the studies are not adequately controlled and peer reviewed. If there can be positive effects, there can also be negative ones if used incorrectly or in bad combinations especially with traditional pharmacology.

The term "aromatherapy" has been applied to such a wide range of products that almost anything which contains essential oils is likely to be called an "aromatherapy product", rendering the term somewhat meaningless in that context.

Some proponents of aromatherapy believe that the claimed effect of each type of oil is not caused by the chemicals in the oil interacting with the senses, but that the oil contains a distillation of the "life force" of the plant from which it is derived that will "balance the energies" of the body and promote healing or well-being by purging negative vibrations from the body's energy field. Arguing that there is little scientific evidence that healing can be achieved, or that the claimed "energies" even exist, many skeptics reject this form of aromatherapy as pseudoscience or even quackery.

References and Links Wikipedia

-

Historically aromatherapy has been used for thousands of years for healing and spiritual rituals. Aromatherapy and its various uses was a sacred practice in most traditional cultures including the Persian, Hebrew, Mayan, Greek, Egyptian and Chinese.

Today, aromatherapy is a very active movement in Europe, especially in France where it is now a recognized medicine reimbursed by medical insurance.

Plants from all over the world contain useful essential oils. These highly volatile oily substances to which the plant owes its perfume and flavor, are present between the cells and act as plant hormones, regulators, and catalysts. They may be considered as representing the vital elements or life force within the plant.

Extraction methods are of utmost importance with purity being imperative in order to obtain good therapeutic results.

Breathing in these essentials oils is what gets the required results.

Aromatherapy requires an extremely high quality of essential oils. Synthetic substances cannot replace the real product. There are hundreds of chemical components in essential oils. Most of them are in minute quantities, and yet it is the precise combinations and ratios of elements which render each oil powerful.

Because of that, solvents or preservatives are not used in the preparation of first-quality essential oils. A steam-distillation method of extraction is used instead. This process consists of sending steam througout the plants, which evaporates oils.

The steam is then condensed and the oils separate from the water. This method yields a high quality oil. The best oils come from wild organic plants.

The amount of oils found in each plant varies greatly and this is reflected in the price.

Essential Oils And Their Uses
 Basil: a nerve tonic for insomnia, congestion and colds

 Clove Oil: an antispetic used for toothaches,wounds and respitory infections.

 Eucalyptus Oil: clears respitory passages good for skin infections

 Frankincense: for all catarrh conditons, ulcers, boils, skin care, and laryngitis

 Geranium: calming effect on the nervous system, kidney stones, skin care

 Lemon: counteracts stomach acidity, powerful bactericide

 Mint: headaches and vomiting, fevers and colds

 Orange oil: sedative, slightly hypnotic, indicated for cardiac spasms