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DHA的英文全称是DOCOSA HEXAENOIC ACID,即二十二碳六烯酸。EPA的英文全称是EICOSA PENTAENOIC ACID,即二十碳五烯酸。这两个缩字词,现在已经在科学界常用。它们均存在于鱼类(主要是海鱼)的肝油和体油之中。按照脂肪酸的化学结构来划分,分子结构中没有双键的脂肪酸称为饱和脂肪酸,有双键的称为不饱和脂肪酸,有两个和两个以上双键的称为多不饱和脂肪酸,而DHA和EPA则是十分宝贵的长碳链多不饱和脂肪酸。
The English name of DHA is DOCOSA HEXAENOIC ACID, namely docosahexaenoic acid. EPA’s full English name is EICOSA PENTAENOIC ACID, eicosapentaenoic acid. These two abbreviations are now commonly used in the scientific community. They are found in the liver and body oils of fish (mainly marine fish). According to the chemical structure of fatty acids to be divided, the molecular structure of fatty acids without double bonds known as saturated fatty acids, double bonds known as unsaturated fatty acids, with two or more double bonds called polyunsaturated fatty acids, and DHA EPA is a very valuable long-chain polyunsaturated fatty acid.