02 Mar 2020 --- Omega 3s may do as much harm as they do good – according to new research from the University of East Anglia (UEA). Two systematic reviews have found that omega 3 supplements may slightly reduce coronary heart disease mortality and events, but slightly increase the risk of prostate cancer. The researchers note that further trials are warranted to better understand the health outcomes related to omega 3 intake, particularly through oily fish as a whole food. The research was endorsed by the World Health Organisation (WHO).