Doctors know omega-3 fatty acids help those with heart disease and wanted to see if omega-3s would lower the chances of heart problems in healthy people.
Researchers in one heart study measured the amount of omega-3s in the diets of over 57,000 healthy adults. Over the next eight years, doctors wanted to see who would develop acute coronary syndrome (ACS), a condition where plaques partially or completely block coronary arteries, causing sudden chest pain and which may lead to a heart attack. Chances of ACS began to decrease as men consumed more than 390 mg of omega-3s per day. While chances of ACS in women did not change with omega-3 levels, men who got more than 390 mg of omega-3s per day were 27 percent less likely to have ACS than were men who got less.