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Aloe vera
''Aloe vera'' ( or ) is a succulent plant species. The species as being used in herbal medicine since the beginning of the first century AD. Extracts from ''Aloe vera'' are widely used in the cosmetics and alternative medicine industries, being marketed as variously having rejuvenating, healing, or soothing properties. There is, however, little scientific evidence of the effectiveness or safety of ''Aloe vera'' extracts for either cosmetic or medicinal purposes, and what positive evidence is available is frequently contradicted by other studies.
==Description==
''Aloe vera'' is a stemless or very short-stemmed succulent plant growing to 60–100 cm (24–39 in) tall, spreading by offsets. The leaves are thick and fleshy, green to grey-green, with some varieties showing white flecks on their upper and lower stem surfaces.〔Yates A. (2002) ''Yates Garden Guide''. Harper Collins Australia〕 The margin of the leaf is serrated and has small white teeth. The flowers are produced in summer on a spike up to tall, each flower being pendulous, with a yellow tubular corolla 2–3 cm (0.8–1.2 in) long.〔〔Random House Australia ''Botanica's Pocket Gardening Encyclopedia for Australian Gardeners'' Random House Publishers, Australia〕 Like other ''Aloe'' species, ''Aloe vera'' forms arbuscular mycorrhiza, a symbiosis that allows the plant better access to mineral nutrients in soil.
''Aloe vera'' leaves contain phytochemicals under study for possible bioactivity, such as acetylated mannans, polymannans, anthraquinone C-glycosides, anthrones, other anthraquinones, such as emodin, and various lectins.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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