@KTzone » 日常 - 健康資訊 » 銀杏防癡呆症不顯


2012-9-8 14:59 icyrain
銀杏防癡呆症不顯

銀杏防癡呆症不顯

近年銀杏(又稱白果)成為深受長者歡迎的健康食品,因相信其具有抵禦癡呆症的功效。

然而歐洲最新科學研究發現,銀杏的功效或許不如外界想像般顯著。有關研究由法國科學家進行,並刊登於最新一期權威醫學期刊《刺針腦神經學》。

以2800名70歲長者測試

研究人員以二千八百名七十歲以上長者為測試對象,他們均有記憶力問題,當中半數人每日服用二百四十毫克銀杏精華,另外一半人則只服用安慰劑。

他們其後會接受為期五年的跟進,並每年進行一次認知能力評估,最終約有七成參加者可於跟進期內,維持每日服用銀杏精華或安慰劑。

結果發現,在服用銀杏的長者中,有六十一人其後被診斷患阿茲海默症,即最常見的老年癡呆症;至於服用安慰劑的長者則有七十三人患該症,
兩者的發病率並無統計學上的差異,即顯示服用銀杏對預防癡呆症無顯著作用。

負責研究的學者指出,以往的動物研究顯示,銀杏精華可防止癡呆症,但在人類身上的作用則未能證實,
暫時未知為何長者服用銀杏精華後無明顯效果,亦不排除他們需持續服用較長時間才能見效。

2013-6-25 20:37 g246t1471s
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