A study of the benefits of fish oil for the heart supports the adage that one can have too much good.
Orate amounts of omega-3 fatty acids found in oily fish decrease the chances of abnormal heartbeat – but the risk for those who consume high levels has increased.
Excessive amounts of omega-3 were actually more harmful than a zero intake.
The researchers discovered a “U-shaped” link between the intake of omega-3s from the ocean and the risk of developing atrial fibrillation, which leads to accidental heartbeats.
The best protection was seen in people who consumed about 0.63 grams of omega-3s daily, which is equivalent to two servings of fatty fish per week.
In a previous study, a 28 percent reduction in AF risk was associated with eating fish one to four times a week, compared to eating fish less than once a month.