Everything must be looked at the point of no consumption.... The slim amount of breatharians which live on this earth would not call these animal by-products essential.. I barely consume fruit fats and by brain works VERY efficently, my memory is exceptional and have no need for phonebooks, business cards, etc... Again these non-essentials contain diseases, toxins, etc... the fish obtained... I am not a scientise, nutritionist, EFA Professional although no animal products will be put in my body. I have reached the level of purity by cleansing and fruit eating. By stopping the toxins from coming in... Vegetables do not agree with any human body. The journey to purely fruit eating is one which courage and will are ultimately tested..
In regards to balances, overuse, or lack of certain fats... I am sure nature has all the right calculations worked out... Trust the earth not the word of man.