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According to reports in the Journal of Science, however, farmed salmon may contain high levels of dioxins. Omega 3 comes in three types, ALA, DHA and EPA; wild salmon has traditionally been an important source of DHA and EPA, which are important for brain function and structure, among other things.
The exciting, fairly recent development is the realization that omega-3 fats have potential to help slow cognitive problems such as Alzheimer's disease and age-related cognitive decline. Also, people who have sufficient levels of omega-3's (especially as compared to omega-6 fats) seem to have less depression and suicide risk, as well as less aggression.
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