高脂低碳餐單,亦即是生酮飲食,越漸普及化,經常標榜為減肥的有效秘方。406Please respect copyright.PENANAO2RcEboQYu
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的而且確,生酮飲食可以促進脂肪燃燒,而且會大量消耗身體的糖原,而每一個單位的糖原會黏上四個單位的水份關係,生酮飲食短期間會消耗身體水份含量,得以獲取快速的減磅效果。406Please respect copyright.PENANACszWCFsQJl
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但另一方面,生酮飲食包含眾多高脂食物,而這些食物一直被指責為心臟病、癡肥糖尿病等的元兇,那麼究竟生酮飲食是好還是壞呢?406Please respect copyright.PENANApAV3tlAIg6
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(圖2)有科學家進行了人體測試(Ref1),找來14名年齡為27-42歲男性單車運動員,分成兩組進行持續六個月以上的生酮飲食(LCHF)及均衡飲食(Mixed)的飲食管理,成份如圖中所示。406Please respect copyright.PENANAkEy8E2zbgp
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(圖3)六個月的餐單後,兩組人各自進食含75克葡萄糖的食物,然後再分別量度血糖及血液胰島素的濃度。406Please respect copyright.PENANA8vmbcWIhHV
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如左圖所示,生酮飲食(LCHF)組別的血糖明顯比均衡飲食(Mixed)為高。406Please respect copyright.PENANArkpwjfRnIj
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而且亦可見生酮飲食(LCHF)組別胰島素的產生時間較均衡飲食(Mixed)為延遲。406Please respect copyright.PENANAGoRiQ8FRQ2
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這歸咎於生酮飲食(LCHF)組別的肌肉擁有較少GLUT4及IRS1蛋白質;406Please respect copyright.PENANAIMyKd5MZPu
GLUT4及IRS1分別為其中一種負責吸取葡萄糖及接收胰島素的蛋白質。406Please respect copyright.PENANAILHpVAnGC8
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(圖4)雖然兩組人員在血糖及胰島素相關方面有顯著分別,但各種與新陳代謝有關的蛋白酶以及肌肉組成的比例,並沒有因為飲食不同而有所轉變。406Please respect copyright.PENANAfUMsdM9RS0
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當然,與新陳代謝有關的蛋白酶數量繁多,不能擔保表外的蛋白酶會否有所影響。406Please respect copyright.PENANA5tYjUs9L5x
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生酮飲食測試者需要更長的時間才能降低血糖,相信是因為長期攝取低碳水化合物而引起的轉變,會否因此增加糖尿病的機會還成未知之數;406Please respect copyright.PENANAXyUqJFfcCF
不過生酮飲食本身就是低糖飲食,血糖理論上不會超標,所以根本沒有相干。406Please respect copyright.PENANARmL1DTbrpv
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之於生酮飲食究竟會否引起心臟病等問題,還有待更詳細的長期人體實驗才能證實得到。406Please respect copyright.PENANAl0vroLi8on
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如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。406Please respect copyright.PENANA1TlaHK6xRz
406Please respect copyright.PENANAzO746XyPOt
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc406Please respect copyright.PENANA0kFvj18gro
406Please respect copyright.PENANAehu0I0Hp9c
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。406Please respect copyright.PENANA5jxVh6Zaum
406Please respect copyright.PENANAjBYtZ77oon
Link:406Please respect copyright.PENANAWt9oFOV7H9
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio406Please respect copyright.PENANAdocf1Z56Gh
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有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。406Please respect copyright.PENANAdPEb1uba7w
406Please respect copyright.PENANAqBJ6WNf3ZX
https://www.instagram.com/potatopigtongue/406Please respect copyright.PENANALp3KLszflZ
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Ref1:https://journals.humankinetics.com/view/journals/ijsnem/30/3/article-p210.xml406Please respect copyright.PENANALtwsl3cJOr
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #90
深入淺出–生酮飲食對人體的其中一種影響
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