Bad news: Omega 3s don’t confer any significant health benefits; good news: They’re mostly harmless

40+ years ago a pair of Danish scientists acquired the mistaken belief that Greenlanders had a very low incidence of heart disease (turned out that people who live in extremely rural conditions without access to modern medicine just have a low incidence of reported heart disease); they concluded that the Omega-3s in their diet was responsible and a thousand nutritional supplement fortunes were born.