I think it's an interesting study, but does not convince me that EPA necessarily causes problems, when taken with DHA and ALA, a good diet and exercise. EPA would help in other ways, to reduce inflammation, support heart health, and lower triglycerides. Perhaps the study shows that too much EPA causes problems among with people with reoccuring mild head injuries, which would be an important contribution in sports and military medicine. I see that there is a long history of this research in fatty acids at the Medical University of South Carolina, sometimes funded by the Dept of Defence, Veterans Admin, the NIH and a range of other institutions and funds.