Omega 3 essential fatty acids are a necessity to our health, however  they cannot be made by the body itself and therefore needs to be  obtained from the food we eat. There are two main forms or essential  fatty acid ALA and LA, the non-essential DHA and EPA can be made by the  body of a healthy human when ALA is converted into EPA and later into  DHA. Although DHA is produced by the body naturally, not enough is  produce for optimum biochemical performance, therefore a diet rich in  DHA needs to be eaten.