An Emmy-award-winning journalist and physician, Dr. Mallika Marshall has been practicing medicine for over 20 years. Currently serving on the frontlines caring for COVID-19 patients at Harvard Medical School and Massachusetts General Hospital, she also hosts and contributes to Harvard Health Publications as a host and contributing editor.

Research has shown that fish oil supplements may increase the risk of stroke and heart disease in healthy adults. Despite containing omega-3 fatty acids that reduce inflammation and provide heart-health benefits, these supplements behave differently in healthy individuals compared to those with existing cardiovascular issues. For people without heart problems, experts recommend avoiding fish oil supplements and instead consuming a heart-healthy diet with natural omega-3 sources like fatty fish.