Fatty fish include trout, tuna, mackerel, herring, salmon and sardines.
Scientists have long believed that omega-3 fatty acids excellent health properties that prevent may have cardiovascular disease in fish oil.
Now they think they know why.
They found that fish oil is able to "counteract the harmful effects of stress on the heart."
This is the result of a new research called fish oil and neurovascular reactivity to mental stress in humans.
He showed that people who take fish oil for more than a month had lasted less mental stress in measures of cardiovascular health, compared to those who took olive oil instead.
The measures included heart rate and muscle sympathetic activity (MSNA).
Those were tested either nine grams of fish oil per day or nine grams of olive oil, a placebo that has not been proven to have been given the same cardiovascular benefits of fish oil.
The results between the two groups is not significant when they are relaxed.
As they passed the stress tests, but fared those who took fish oil better.
The researchers believe that these results will help to prevent professionals to heart disease in some populations.
