炒菜加醋保存维生素(图)--长沙美食网

精彩食尚特色菜石姐调味吃界动向好店推荐休闲食趣食疗食补美食趣闻天下美食餐饮界投诉台餐饮打折超市速递

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炒菜加醋保存维生素(图)

http://eat.csonline.com.cn 2006年08月02日10时3分星辰美食网

　　蔬菜是我们获得维生素的重要来源。据研究，成人每天至少要吃200克—500克蔬菜，才能保证摄入足够的营养。但是，蔬菜在加工、烹调过程中，由于方法不当往往会造成大量的营养损失。怎么做才能最大限度地保存蔬菜中的维生素呢？

　　1.择菜：尽量保留老叶。由于生长期长、接受光照时间长，老叶中养分积累得多。此外，蔬菜的叶部比茎部维生素C含量高，外层菜叶比内层菜叶含量高。

　　2.洗菜：要先洗后切，浸泡时要适可而止。因为蔬菜中有很多维生素是水溶性的，切后再洗或泡的时间长会使它们溶解于水中，造成营养损失。

　　3.切菜：要随切随炒，切忌切好后久置。空气中含氧量高，蔬菜久置其中，特别是在高温、阳光直射状态下，维生素A、维生素C会很快降解。

　　4.烹饪：烹调蔬菜时适当加点醋，可以减少维生素C的损失。这是因为维生素C在碱性环境中容易被破坏，而在酸性环境中则比较稳定。此外，勾芡也是保护维生素C的好办法。淀粉含谷胱甘肽，可减少维生素流失。

　　5.炒菜：一定要快。蔬菜中所含的营养成分大都不能耐高温，尤其是芦笋、卷心菜、芹菜、甜菜和大白菜等有叶蔬菜，久炒久熬，损失的营养较多。为使菜梗易熟，可先炒菜梗，再放菜叶一同炒；如要整片长叶下锅炒，可在根部划上刀痕，会熟得较快。熬菜或煮菜时，应等水煮沸后再将菜放入，可以减少维生素损失。

　　6.食用：最好连皮一起吃。蔬菜的营养成分大都集中在皮下，如果削皮会造成一定的损失，所以只要表面无污染，就应连皮一起吃。

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