换着颜色吃蔬菜 营养会更均衡
发布时间：2011-02-28
来源：
市场上的蔬菜种类繁多，不同蔬菜的营养各异。通常，红色的富含番茄红素，可增活力；黄色的含胡萝卜素，保护视力，紫色的含花青素，预防衰老；绿色的富含胡萝卜素和类黄酮，护心护肝；白色的水分和糖分含量高，美肤润肺。
即便是同种蔬菜，颜色不同，营养也会各有千秋，过段时间就应换换颜色吃。
西红柿：红的番茄红素多，黄的胡萝卜素多。红番茄含番茄红素更多，可以有效防治因衰老、免疫力下降引起的疾病。黄色的番茄红素含量少，但所含的胡萝卜素更多，可防止皮肤干燥、粗糙。
柿子椒：红色的含维生素最多。红色柿子椒维生素含量最高，每100克含140毫克，绿色和黄色柿子椒维生素含量只能达到其一半。红柿子椒还含有丰富的β-胡萝卜素、维生素B6，维生素E和叶酸。
胡萝卜：偏黄色的护眼，偏红色的护心。黄色胡萝卜富含的叶黄素，有益眼睛健康。红色胡萝卜含有番茄红素，对心脏健康有益，对一些癌症也有一定预防效果。
洋葱：紫皮含花青素，白、黄皮的补维C。紫皮洋葱的蛋白质、膳食纤维以及钙、钾、钠等矿物质含量均比黄、白皮的高；但后两者的胡萝卜素、维生素C的含量较紫皮的高，抗疲劳效果好。
紫皮洋葱中还含有植物花青素，这是一种强抗氧化物质。它可以保护人体免受自由基的损伤，抑制炎症和过敏，抗衰老。
圆白菜：紫色的花青素含量高。白色的圆白菜又叫卷心菜，紫的也叫紫甘蓝。两者均含有大量维生素C、纤维素和碳水化合物。卷心菜和紫甘蓝营养没有太大差异，但紫甘蓝含有大量的花青素。
菜花，绿色西兰花维A含量高。两种菜花都富含蛋白质、碳水化合物、纤维素、胡萝卜素和维生素A等。但西兰花的胡萝卜素和维生素A要多于菜花，含量均是菜花的200多倍。
最后专家建议，家庭中炒菜可以换着颜色吃；由于同种蔬菜口感相近，因此炒菜时也可以混合搭配着吃。如可以用菜花、西兰花炒个“蒜蓉双花”，用黄、红西红柿做个酸甜爽口凉拌菜。
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