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Harmful Effects of Too Much Omega 3

Omega-3 fatty acids are an essential part of a heart-healthy diet. Most people need to concentrate on getting more, not less, omega-3 in their diet. The proliferation of supplements containing the nutrient, however, brings a risk of too much omega-3, which could have serious side effects.

  1. Identification

    • Omega-3 fatty acids are unsaturated fatty acids found in fish like trout, mackerel, sardines, salmon, tuna and anchovies. They help lower cholesterol and reduce heart disease risk.

    Recommendations

    • The American Heart Association recommends people without cardiovascular disease eat fatty fish at least twice a week and that those with cardiovascular disease consume about one gram of Omega-3 fatty acids per day. People who need to lower triglycerides might need as much as four grams per day, but people consuming more than three grams per day should first consult a physician.

    Potential

    • It is difficult to exceed the recommended levels of Omega-3 fatty acids through diet alone, according to Mayo Clinic Dietitian Katherine Zeratsky. However, many patients who need higher levels of Omega-3 take supplements such as fish oil, which could boost levels above the recommended amount.

    Effects

    • Excessive amounts of Omega-3 thin the blood and could cause excessive bleeding. This could come in forms as minor as a nosebleed or in severe cases even lead to a stroke, according to Zeratsky.

    Expert Insight

    • Zeratsky recommends that people derive Omega-3 fatty acids as much as possible from fish and other food sources such as walnuts or tofu. Supplement intake should be limited to those who either cannot eat fish or need an extra amount of Omega-3 fatty acids as prescribed by a physician.

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