I am trying to understand why my book and teacher says linoleNic acid is NOT an essential fatty acid, but DHA is. Everywhere i have read else where says that linoleic AND linoleNic are essential. Please help me understand this. The book provides no explaination. Here is a link to the book and page which states this
It is because of fact that in the presence of the essential linolic acid in the organism the linoleNic acid could be synthesised.