A study of more than 100 subjects has found that omega-3 fatty acids can influence mood, personality and behavior.
Study participants with lower blood levels of omega-3s were more likely to have symptoms of depression and a more negative outlook, according to accepted tests for depression, impulsiveness, and personality. Those with higher blood levels demonstrated the opposite emotional states.
The cardiovascular health benefits of omega-3 intake is well known, but the psychological effects are less studied.