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Tea Tree OilTea tree oil is a yellow- or green-tinged essential oil with a fresh camphoraceous odour. It is extracted from the leaves of the tree Melaleuca alternifolia which is native to the northeast coast of New South Wales, Australia. The oil is claimed to have benefical cosmetic and medical properties (including antiseptic and antifungal action). Australian Aborigines have used oil extracted from the tree's needles for hundreds of years. Currently, tea tree oil is obtained by steam distillation of the leaves. Of the over 100 compounds contained in the oil, terpinen-4-ol is responsible for most of the antimicrobial actions. Levels of 14 components are stipulated in the International Standard for Oil of Melaleuca, Terpinen-4-ol type (ISO 4730). Preliminary scientific research (mainly in vitro) supports claims for various health benefits. Inhaled, tea tree oil is said to make breathing easier by "breaking up congestion". It supposedly can alleviate a sore throat and minimize the symptoms of cold, flu and systemic fungal infections. It seems effective against candidiasis and other vaginal infections and for hemorrhoids. As a bath additive it may control bacteria in spas and pools. It is used for fungal nail infections, athlete's foot, foul body odour, burning feet, etc. Massaging tea tree oil into the affected area may alleviate the discomfort of sore muscles or joint injuries. A patch test may be advisable before using items containing tea tree oil, since it can be allergenic. Note that the term "tea tree oil" is somewhat of a misnomer, since Melaleuca alternifolia is a paperbark rather than a tea tree (genus Leptospermum). External links *Nambucca
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