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花生油、玉米油、菜籽油,做饭哪种油最健康?
植物油开封之后,直接和空气接触,其中最主要不饱和脂肪酸很容易和氧化结合发生酸败,产生醛、酮、酸的复杂混合物,致使过氧化值和酸价等理化指标超出标准限值,使得食用油品质变差,增加安全隐患。
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