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Icariin
Icariin is a flavonol glycoside, a type of flavonoid. It is the 8-prenyl derivative of kaempferol 3,7-''O''-diglucoside. The compound is derived from several species of plants belonging to the genus ''Epimedium'', ''Berberidaceae'', which are commonly known as Horny Goat Weed or Yin Yang Huo. Extracts from these plants are reputed to produce aphrodisiac effects, and are commonly used in Chinese herbal medicine to enhance erectile function, as well as for several other indications.
It is thought that icariin is likely to be the primary active component of ''Epimedium'' extracts, as it has been shown to share several mechanisms of action with compounds used in Western medicine to treat impotence and improve sexual function. In particular, icariin has been demonstrated to act as a PDE5 inhibitor and to enhance the production of bioactive nitric oxide, as well as mimicking the effects of testosterone. It also shows antioxidant, antidepressant and neuroprotective effects in animal studies, as well as stimulating osteoblast activity in bone tissue which has been linked to a possible therapeutic role in the treatment of osteoporosis.
== References ==
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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