維生(born)素是(yes)一(one)類人(people)體需求量很小、不(No)會提供熱量也不(No)構成組織細胞的(of)必需營養物質,主要(want)是(yes)參與各種代謝過程。目前已經發現的(of)各類維生(born)素有幾十種之多,主要(want)分爲(for)水溶性維生(born)素(如B族維生(born)素、維生(born)素C、煙酰胺)和(and)脂溶性維生(born)素(如維生(born)素A、維生(born)素D、維生(born)素E、維生(born)素K)。在(exist)當下熱門的(of)營養品中,維生(born)素&礦物質、蛋白質、不(No)飽和(and)脂肪酸占據了(Got it)絕大(big)多數市場。
維生(born)素的(of)重要(want)性在(exist)公衆心目中近乎神聖,當然它的(of)重要(want)性也确實如此,從某種意義上(superior)說,幾乎沒有一(one)個(indivual)人(people)能夠在(exist)不(No)服用(use)營養強化劑的(of)前提下能夠攝入足夠量理想的(of)維生(born)素,一(one)般來(Come)說比較容易缺乏的(of)是(yes)維生(born)素A和(and)某些B族維生(born)素。除此以(by)外還有一(one)些維生(born)素對人(people)體其實并沒有不(No)可或缺的(of)作(do)用(use),譬如維生(born)素E。
維生(born)素E可以(by)稱得上(superior)是(yes)一(one)種明星維生(born)素,據稱對于(At)生(born)育、美容都有一(one)定的(of)幫助,它是(yes)“生(born)育酚”的(of)前體物質,一(one)種能夠促進精子數量增加的(of)物質。另外維生(born)素E愈來(Come)愈多地(land)用(use)于(At)許多化妝品和(and)食品中被冠以(by)“抗氧化”的(of)功能。維生(born)素E對于(At)維持生(born)殖系統的(of)正常功能以(by)及抗氧化都沒有錯,但是(yes)如果爲(for)此而輕信了(Got it)廣告,那就要(want)讓你失望了(Got it)。維生(born)素E确實能夠水解爲(for)“生(born)育酚”,但是(yes)對人(people)體并沒有什麽卵用(use),大(big)量的(of)研究表明維生(born)素E在(exist)某些動物例如大(big)鼠中發揮不(No)可或缺的(of)作(do)用(use),但是(yes)并不(No)是(yes)人(people)體的(of)必需營養元素。至于(At)說抗氧化功能,維生(born)素E的(of)抗氧化功效并不(No)值得誇張的(of)報道,因爲(for)食物中的(of)抗氧化物質實在(exist)太多,例如異黃酮、維生(born)素C、花青素等等。因此維生(born)素E并沒有宣傳得那麽神乎其神。
不(No)僅如此,任何一(one)種脂溶性的(of)維生(born)素都需要(want)慎重補充,脂溶性維生(born)素不(No)易通過泌尿系統排出(out)體外,不(No)正确的(of)補充更容易造成在(exist)體内的(of)積累并導緻中毒,過量的(of)維生(born)素可以(by)導緻嚴重的(of)心血管疾病,對于(At)正在(exist)用(use)藥的(of)心血管患者,過量的(of)維生(born)素E可能會拮抗一(one)些藥物的(of)功能。
當然,也有一(one)些研究發現維生(born)素E對人(people)體确實有某些功能,但這(this)些研究或是(yes)缺乏足夠的(of)數據支持,或是(yes)具有可替代的(of)其他(he)營養元素。另外通過正常的(of)膳食攝入通常已經能夠攝入足量的(of)維生(born)素E,特别地(land)去補充它是(yes)沒有必要(want)的(of)。如果一(one)定要(want)補充,寶藤健康提供血清維生(born)素E的(of)含量檢測,将能夠爲(for)您的(of)營養強化作(do)出(out)指導。
維生(born)素A是(yes)非常重要(want)的(of)脂溶性維生(born)素,過量補充會導緻中毒,該如何是(yes)好?維生(born)素A缺乏的(of)人(people)群極廣,甚至有很多人(people)因爲(for)缺乏維生(born)素A死亡,維生(born)素A的(of)重要(want)性我(I)們(them)不(No)再贅述,就談一(one)下維生(born)素A的(of)補充。在(exist)日常生(born)活中我(I)們(them)攝入維生(born)素A的(of)途徑更多的(of)是(yes)通過攝入胡蘿蔔素,胡蘿蔔素再轉變爲(for)維生(born)素A,如果補充足量的(of)胡蘿蔔素一(one)般也就不(No)會缺乏維生(born)素A。這(this)裏我(I)們(them)特别要(want)爲(for)轉基因黃金大(big)米正名,食用(use)富含胡蘿蔔素的(of)黃金大(big)米或者胡蘿蔔,人(people)體會很聰明地(land)根據自身的(of)需要(want)量轉化足夠量的(of)維生(born)素A,而不(No)會将全部吸收的(of)胡蘿蔔素轉化爲(for)維生(born)素A,所以(by)不(No)用(use)擔心維生(born)素A中毒的(of)情況發生(born)。