ARA, also known as arachidonic acid, is an important unsaturated fatty acid required by the human body. ARA, scientifically known as eicosatetraenoic acid, also known as arachidonic acid, is an n-6 type long-chain polyunsaturated fatty acid, which belongs to essential fatty acids in early childhood, and can be converted from essential fatty acids such as linoleic acid and linolenic acid into semi-essential fatty acids at this point in time after growth. The lack of ARA may have serious adverse effects on the development of human tissues and organs, especially the development of the brain and nervous system, so in early childhood, parents are advised to choose formula containing ARA to feed their babies, in order to meet the physiological needs of infants and young children.