Fish oil has many proven benefits for heart function and the cardiovascular system. Medical studies have shown that fish oil can lower certain types of cholesterol, reduce the risk of heart attack, and lower the risk of death or hospitalization for heart failure patients.
History
Medical researchers realized the benefits of fish oil for heart function after studying the Eskimos. Even though Eskimos consume an extremely high-fat diet, they have almost no heart disease. After further analysis, researchers realized that Eskimos' strong heart function stemmed from their high rate of fish oil consumption.
Significance
Fish oil is high in two different types of omega-3 fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which medical experts consider essential for human health. Multiple medical research studies have concluded that consuming EPA and DHA help improve heart function and cardiovascular system performance.
Effects
According to the Mayo Clinic, fish oil can lower triglycerides (a dangerous component of cholesterol), reduce the risk of abnormal heart rhythms and strokes in people with known cardiovascular disease, and slow the buildup of plaque in the arteries. It also can lower blood pressure slightly, and potentially decrease deaths and hospitalizations from heart failure.
Considerations
People can get fish oil two ways: from eating oily fish, or by consuming supplements. The American Heart Association recommends two servings of oily fish (such as salmon, mackerel or albacore tuna), or a total of about 7 oz. of fish per week. This amount of Atlantic salmon, for example, contains almost 4.5 oz. of omega-3 fatty acids.
Warning
Some medical experts warn against consuming too much fish because of high levels of mercury and other toxic substances. In that case, patients who want to improve their heart function can consider taking supplements. However, taking too high a dose of fish oil can lead to an increased risk of bleeding, and medical authorities recommend not exceeding a dose of 3g per day without consulting with a physician.
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