Flax oil is an excellent source of omega 3 EFAs but is a poor source of omega 6 EFAs. Flax is considered to be too rich in omega 3 for the long-term and can lead to omega 6 deficiency, because omega 3 and omega 6 EFAs compete for enzyme space in our cells.
Although it is generally considered that the western diet contains enough omega 6, they generally come from poor, damaged sources. Todays main sources of omega 6 are cooking oils and margarines, which have been processed heavily with harsh chemicals to ensure a long shelf life. This has left us in the situation where although we do get some omega 6 intake, it is damaged to the extent where it is now harmful, rather than beneficial to health.