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維生素我們非吃不可嗎？

出處：網絡收集 日期：2024-07-11 14:35:43 編輯：秩名

在人類目前已知的各大類營養(yǎng)素中，維生素可以說是最富有傳奇色彩的了。它也是目前已知的六大營養(yǎng)素（如果加上膳食纖維就是七大營養(yǎng)素）中被發(fā)現得最晚的一種必需營養(yǎng)物質。它不能為機體產生能量，機體對它的需要量很小，但它卻是維持機體的基本功能（如生長、代謝和維持細胞完整性）所必不可少的一類物質。不同種類的維生素有一些共同的特性：維生素均以維生素原的形式存在于食物中；多數的維生素，機體不能合成或合成量不足，不能滿足機體的需要，必須經常通過食物中獲得；人體對維生素的需要量很小，日需要量常以毫克或微克計算，但一旦缺乏就會引發(fā)相應的維生素缺乏癥，對人體健康造成損害。
 
維生素一般可分為兩大類，即水溶性維生素和脂溶性維生素。如我們熟知的維生素C、B族維生素都屬于水溶性維生素。而我們熟知的維生素A、D、E、K都是脂溶性維生素。由于化學屬性的不同，我們在攝取不同種類的維生素時，需要注意不同的方法。我們如果要從一些食物中盡可能攝取一些脂溶性維生素時，最好在有脂肪和加熱的條件下加工。如攝取胡蘿卜中的維生素A的前體類胡蘿卜素時，和攝取番茄中的番茄紅素時。如要多攝取一些加熱過程中易破壞的維生素（如維生素C）和一些植物化學物質時，可以把胡蘿卜和番茄等生吃。

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