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Bay Rum Hair Loss. An essential engine oil is a focused hydrophobic liquid containing volatile aroma ingredients from crops. Essential oils are also known as volatile oils, ethereal natural oils, aetherolea, or just as the olive oil of the seed from which these were extracted, such as oil of clove. An oil is "essential" in the sense that it includes the "essence of" the plant's fragrance--the characteristic perfume of the herb from which it comes from. The term essential used here will not mean indispensable as with the terms essential amino acid solution or essential oily acid which are so called being that they are nutritionally required by a given living organism.

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Essential oils are usually extracted by distillation, often by using vapor. Other operations include appearance, solvent extraction, total oil removal, resin tapping, and frigid pressing. They are being used in perfumes, makeup, soaps and other products, for flavoring food and drink, and for adding scents to incense and household cleaning products.

Essential oils have been used medicinally throughout history. The earliest saved reference to the techniques and methods used to create essential natural oils is believed to be that of Ibn al-Baitar (1188-1248), an Al-Andalusian (Muslim-controlled Spain) physician, pharmacist and chemist.

Rather than refer to essential natural oils themselves, modern works typically discuss specific chemical compounds of which the essential oils are composed. For instance: methyl salicylate rather than "oil of wintergreen".

Affinity for essential oils has revived in recent decades with the acceptance of aromatherapy, a branch of substitute remedies that uses essential oils and other aromatic materials. Natural oils are volatilized, diluted in a carrier essential oil and found in massage therapy, diffused in the air with a nebulizer, heated over a candle fire, or burned as incense.

Medical applications proposed by those who sell medicinal oils range between skin area treatments to remedies for cancers and often are based only on historical accounts of use of essential natural oils for these purposes. Boasts for the effectiveness of medical treatments, and treatment of cancers in particular, are actually subject to rules in most countries.

Most usual essential natural oils such as lavender, peppermint, tea tree engine oil, patchouli, and eucalyptus are distilled. Natural plant material, consisting of the blossoms, leaves, hardwood, bark, roots, seeds, or peel, is put into an alembic (distillation equipment) over drinking water. As the water is warmed, the steam moves through the plant material, vaporizing the volatile substances. The vapors flow through a coil, where they condense back again to water, which is then accumulated in the obtaining vessel.

Most oils are distilled in a single process. One exemption is ylang-ylang (Cananga odorata) which is purifed through the fractional distillation.

The recondensed water is known as a hydrosol, hydrolat, natural and organic distillate, or vegetable water essence, which might be sold as another fragrant product. Popular hydrosols include rose water, lavender normal water, lemon balm, clary sage, and orange blossom normal water. The use of organic distillates in beauty products is increasing. Some vegetable hydrosols have distressing smells and are therefore not sold.