There will come a time, when the current trend to incorporate all the "essential" fatty acids in one's diet will once again come to an end. It is similar to the old misleading idea that if you suffer from calcium deficiency you need to drink milk, we are now made to believe we require those special fatty acids to sustain a healthy body. This is not true. In fact, it hard to digest these concentrated nut and seed oils. If they are not already rancid, like most of them are to some extent, they can quickly oxidize in the body, which may lead to major allergic reactions (which is only normal and natural).