which are the most common fatty acids?
α-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)
Omega-3 fatty acid
The three types of omega−3 fatty acids involved in human physiology are α-linolenic acid (ALA), found in plant oils, and eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), both commonly found in marine oils. 
what does single episode major depressive disorder mean UNANSWERABLE what are symptoms of  this disorder? Low mood, symptoms of psychosis; like delusions and hallucinations are some of them how it is caused? Childhood abuse, either physical, sexual or psychological are all risk factors how this can be prevented? Eating large amounts of fish, Behavioral interventions, such as interpersonal therapy and cognitive-behavioral therapy which medicines can prove to be helpful against this disorder? Omega-3 fatty acids fish oil supplements, celecoxib are few what is meant by the second symptom mentioned above? It is an abnormal condition of the mind that results in difficulties determining what is real and what is not real what is this fatty acid mentioned above? They are polyunsaturated fatty acids (PUFAs) characterized by the presence of a double bond three atoms away from the terminal methyl group in their chemical structure
wiki:25637705
Omega-3 fatty acid [SEP] Introduction
Omega−3 fatty acids, also called Omega-3 oils, ω−3 fatty acids or "n"−3 fatty acids, are polyunsaturated fatty acids (PUFAs) characterized by the presence of a double bond three atoms away from the terminal methyl group in their chemical structure. They are widely distributed in nature, being important constituents of animal lipid metabolism, and they play an important role in the human diet and in human physiology. The three types of omega−3 fatty acids involved in human physiology are α-linolenic acid (ALA), found in plant oils, and eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), both commonly found in marine oils. Marine algae and phytoplankton are primary sources of omega−3 fatty acids.