茶是一種具鎮靜及提神作用的飲料,飲用者遍佈世界各地,而總茶葉生產量預計在2027年會達到三百六十萬噸。626Please respect copyright.PENANA1h0RDlsnFA
626Please respect copyright.PENANAjD6SnZtm0v
有不少研究指出飲用長期綠茶有延壽及抗鬱的作用,是否百分之百真確仍有一定的爭議,而本篇文章只會側重講及一項與飲茶相關的有趣研究結果。626Please respect copyright.PENANAsQsDj1QHP0
626Please respect copyright.PENANAZImdvHUEIp
626Please respect copyright.PENANAosDIpVPzX5
在講述研究結果之前,我們先行講及一下與茶葉有關的資訊。626Please respect copyright.PENANAUq86iwT5Ce
以淨重量作計算的話,茶葉總共有42%左右是一種名為Epigallocatechin gallate626Please respect copyright.PENANAj0D4TOeCez
(EGCG)的物質,而3%左右則為茶氨酸(L-Theanine)物質,兩者均能進入腦部裡頭,而其中之一的效果就是減低身體皮質醇(cortisol)含量,帶出鎮靜效果。626Please respect copyright.PENANAwWgTDXLT74
626Please respect copyright.PENANASjzsnXSllQ
概括來說,長期皮質醇偏高將會招來抑鬱症狀及肥胖的產生。若反應熱烈的話,可對皮質醇作另一篇深入淺出的文章。626Please respect copyright.PENANADhGivq5eN1
626Please respect copyright.PENANAG3SqxjShgl
茶葉亦有5%左右為咖啡因(Caffeine),咖啡因當樣能進入腦部,有著阻截Adenosine與神經細胞某部位結合的效果,引致神經細胞持續運作,減低睡眠感。626Please respect copyright.PENANAdOYvUNEZCV
626Please respect copyright.PENANAeRBDOBXEK3
626Please respect copyright.PENANAFiAJjmLDdw
(圖2)針對飲茶的研究多不勝數,不少亦有質量參差或帶有偏頗成份的研究。626Please respect copyright.PENANATSJTAmf0wu
而在一份相對上具有認受性的研究中(Ref1),文章作者找來75名18-55歲無吸煙習慣的男人,強迫他們進行為期4星期戒茶、戒咖啡及戒含咖啡因的飲品的日子,藉此調節他們身體內的咖啡因含量。626Please respect copyright.PENANAtooeio5oic
626Please respect copyright.PENANA9Vg8bEZaqn
626Please respect copyright.PENANAbOglcaIfBX
4星期過後,他們將會分成兩組,在之後的6星期每日飲下與較早前4杯同色同味的飲料,一組為指定咖啡因份量的飲品,而另一組則為指定咖啡因份量及含有茶葉成份的飲料。626Please respect copyright.PENANAdDUHdp3IEb
626Please respect copyright.PENANAGrEtRCn59F
626Please respect copyright.PENANAIIehRsD0sf
(圖3)6星期過後,受訪者將會進行兩項突擊壓力測試,過程中將會量度心跳及各項不同數據。626Please respect copyright.PENANAaJ7BV6AGC2
626Please respect copyright.PENANAGYMluhYEjs
626Please respect copyright.PENANAjRH8KUhLN8
第一項壓力測試為3分鐘拍攝演講,受訪者將會隨機被派發高壓模擬情景題,例如面對失業或被指控店內偷竊等,他們有2分鐘準備的時間,之後便要對著攝錄機進行3分鐘的演講,記錄表現。626Please respect copyright.PENANA2tPgmeGSGs
626Please respect copyright.PENANAq6Q7ayzWCe
626Please respect copyright.PENANAjiTOlcAwQl
(圖4)而第二項的測試為Mirror Tracing,如圖中一樣對著鏡子的方式畫星星。持續5分鐘。626Please respect copyright.PENANA9TVIfOhVnZ
626Please respect copyright.PENANAbS48ObUL3V
626Please respect copyright.PENANAo6RHV3OhhS
(圖5)是次研究中得出了不同數據,其中一項與皮質醇有關。626Please respect copyright.PENANAkXW7mbsQor
626Please respect copyright.PENANA8gC0GskEqI
626Please respect copyright.PENANAIjf8djQKQS
他們發現飲茶者,口水皮質醇在高壓活動後50分鐘下跌73%左右,而沒有飲茶的組別則只下跌53%左右。626Please respect copyright.PENANAjeuYaRHEEB
626Please respect copyright.PENANAVgznGUNYGj
過往亦有不少研究指出飲茶能夠有助壓力過後的紓緩,以及對心情和認知方面起上一定的正面作用。626Please respect copyright.PENANAHjMeDK5qPj
626Please respect copyright.PENANAVOTWeK4c09
但這正面效果究竟是茶裡的那一項或是數項成份所引致而成,內裡的相關確實機制又是如何,現今還尚未有一套能獲取較大共識的機制。626Please respect copyright.PENANAUFOzCrdU0v
626Please respect copyright.PENANA5hHmpsHI9W
無論如何,見字飲水,得閒飲茶。626Please respect copyright.PENANAziEifHToij
626Please respect copyright.PENANAHM3OH0ca95
626Please respect copyright.PENANAKp1rYUb4d3
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。626Please respect copyright.PENANAaGdErX6cJi
626Please respect copyright.PENANAYN9qe6CdNp
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/toc626Please respect copyright.PENANAV18VWHfvOu
626Please respect copyright.PENANAzTs2rfumAE
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。626Please respect copyright.PENANA51jd2Mfhlo
626Please respect copyright.PENANAKveShZEl5k
Link:626Please respect copyright.PENANAk9DqnqJamW
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio626Please respect copyright.PENANAFy6hJaSIsC
626Please respect copyright.PENANANtjHrpcnev
626Please respect copyright.PENANAsotxAahvXh
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。626Please respect copyright.PENANAYGQdJNPx4o
626Please respect copyright.PENANAigUa8l02Uk
Ref1:https://pubmed.ncbi.nlm.nih.gov/17013636/626Please respect copyright.PENANALTZm32fbTc