 However, actual evidence has shown that Inuit have a similar prevalence of coronary artery disease as non-Inuit populations and they have excessive mortality due to cerebrovascular strokes, with twice the risk to that of the North American population.Indeed, the cardiovascular risk of this diet is so severe that the addition of a more standard American diet has reduced the incidence of mortality in the Inuit population.Furthermore, fish oil supplement studies have failed to support claims of preventing heart attacks or strokes.