Essential fatty acids, or EFAs, are fatty acids that are required by humans and other animals for normal physiological function that cannot be synthesized in the body.
http://amzn.to/1pqfzyH There are two series of essential fatty acids: one has a double bond three carbon atoms removed from the methyl end; the other has a d...
Fish Oil is snake oil, Fish oil is rancid, Fish oil not true to label are the headlines you may have seen or heard about.Essential fatty acids are fats that our body cannot make, but are vital to health and must be obtained through diet.

EFA. Essential fatty acids (omega 3 and omega 6) cannot be synthesised by the body and must be derived from the diet. EFAs do not provide fuel for energy production and are required for vital biological processes which support growth, development and health. EFSA.
The following is a list of plant foods rich in essential fatty acids: Sources of Omega-3 fatty acids: flax seeds, hemp seeds, canola, walnuts, pumpkin seeds, soybeans and its products such as tofu and tempeh.

Metabolism of the essential fatty acids (EFAs), linoleic acid (LA; 18:2n-6) and -linolenic acid (ALA; 18:2n-3), is limited in the skin; long-chain derivatives of LA and ALA are therefore considered conditionally essential nutrients for skin.
Mercola.com: New Findings About Omega-3 Fatty Acids and Depression.