科學家發現成人體內有棕色脂肪 可能有助減肥

[MK]

http://tw.news.yahoo.com/article/url/d/ ... 1hj1q.html
更新日期:2009/04/09 10:41
（路透波士頓8日電）研究人員今天表示，一種能夠讓新生兒保持溫暖、型態鬆散的脂肪，在成人體內常見的程度，比之前想像的還要高，這項發現可能導引出新的減肥方法。


所謂的棕色脂肪一旦因為低溫而開始活動，燃燒卡路里的速度比一般脂肪要快。由於成人體內的棕色脂肪一般都處於暫時停止活動狀態，所以各方對於成人體內有多少棕色脂肪，甚至於有沒有棕色脂肪，意見不一。


「新英格蘭醫學雜誌」（New England Journal of Medicine）將於明天刊登3篇研究，研究人員報告說，大部分成人體內都可以找到棕色脂肪，並發現將人體置於低溫下，就可以檢測出棕色脂肪。在部分案例中，棕色脂肪區活動比較頻繁的成人，體型比較瘦。


目前的希望是，如果能找到方法，讓這種棕色脂肪活躍起來，並讓身體製造更多棕色脂肪，人們不需額外運動就能燃燒掉額外的卡路里。


主持其中一項研究的波士頓喬斯林糖尿病中心（Joslin Diabetes Center ）賽普瑞斯（Aaron Cypress）醫師接受訪問時說：「50公克活躍程度最高的棕色脂肪，相當於休息時熱量消耗量的20%」，「如果把這些都加起來，相當於一天400或500卡路里。」


他說：「實際上來說，我們很可能研發出治療糖尿病與肥胖的新療法。」中央社（翻譯）

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