As the main compoments of fish oil, EPA and DHA are necessary for the normal development of retina and cerebral cortex of the baby and children , and plays an important role in prevention of cardiovascular disease. Their sanitarian function has been widely known. Usually the EPA and DHA synthesis of human can meet the normal physiological activities , but pregnant, infant, baby and the elderly and disease patients need supplementary EPA and DHA.Currently,the mai sources for these LCPUFAs are oils fr...