維他命E是抗氧化好幫手 但醫師提醒這樣吃容易過量

圖/ingimage維他命E ,又稱為維生素E ,和維生素A 、維生素D 以及維生素K 都屬於脂溶性維生素。維他命E 也常和維他命C 這個好兄弟湊成一組,可以說是抗氧化與抗老界的萬年不敗明星,只要是跟抗老有關的補充品,如果有放維他命的話,那麼配方裡面八成會有維他命C 與維他命E 這兩個基本營養素。維他命E 是脂溶性抗氧化劑,維他命C 則負責擔任水溶性抗氧化劑,它們和其他的抗氧化劑與抗氧化酵素一起對抗自由基,維持體內氧化還原的平衡。 當飲食攝取不足,或是體內氧化情形增加時,體內的抗氧化劑就沒有辦法好好的維持這個平衡,各種慢性疾病或是生理老化的問題,就可能隨之而生。也因此具有抗氧化力的維他命E 補充的需求,在這樣的理論下,就被創造出來了。網路上有關維他命E 的功效以及副作用的討論很多,但到底哪些是真,哪些是假?在這篇文章裡, MedPartner 團隊的醫師和營養師將聯手為您介紹什麼是維他命E 、它在體內如何發揮作用、自由基又是什麼,並從實證的角度看維他命E 的健康功效為何,以及近年關於維他命E 的新觀點。 維他命E 是一個結合名詞,它代表一群脂溶性且有抗氧化能力的化合物。天然的維他命E 有八種,四種生育醇( α- 、 β- 、 γ- 、 δ-tocopherols )和四種生育三烯酚( α- 、 β- 、 γ- 、 δ-tocotrienols )。( alpha = α 、 beta = β 、 gamma = γ 、delta = δ ) 以下的這小段涉及比較複雜的生物化學,沒興趣的人可以跳過。只要知道在體內主要作用的是 α-生育醇...

‘Vitamin E tocotrienols are potential candidates for maintenance of heart health,’ says study Menu Back to Back to Back to Back to Back to Back to Send Follow us on Facebook Follow us on Twitter Follow us on LinkedIn Send Email to a friend Facebook Twitter Linkedin Tip a friend

Data from 31 people indicated that that annatto tocotrienol – composed mainly of delta-tocotrienol – was associated with improvements in a number of cardiovascular risk factors including inflammatory cytokines, nitric oxide (NO) and C-reactive protein (CRP). Writing in the Journal of Clinical & Experimental Cardiology​​researchers from the University of Missouri – Kansas City reported that four weeks of eating a healthy diet and vitamin E tocotrienol supplementation at doses ranging from 125 to 750 mg/day decreased inflammatory and oxidative stress markers significantly. “These results suggest that delta-tocotrienol is a potential candidate for therapeutic applications in the maintenance of health and protection from aging diseases,”​ concluded the researchers, led by Prof. Asaf Qureshi. Vitamin E is a family of eight separate but related molecules: four tocopherols (alpha, beta, gamma, delta) and four tocotrienols (alpha, beta, gamma, delta). While alpha-tocopherol is found in most multivitamins and is supplemented in foods, a growing base of evidence suggests that this popular vitamin E interferes with the uptake and function of tocotrienols. Tocotrienols are derived from ...