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Omega-3 fatty acids are essential for good health. Try to get them from your diet by eating fish — broiled or baked, not fried. Fish oil supplements might be helpful if you have high triglycerides or rheumatoid arthritis. Fish oil appears to contain almost no mercury, which can be a cause for concern in certain types of fish.
1. High Blood Sugar. Some research shows that supplementing with high amounts of omega-3 fatty acids could increase blood sugar levels in people with diabetes.
Learn about the side effects of Omega-3 (omega-3 polyunsaturated fatty acids), from common to rare, for consumers and healthcare professionals.
Side effects from omega-3 fish oil may include: A fishy taste in your mouth. Fishy breath. Stomach upset. Loose stools. Nausea. Taking more than 3 grams of fish oil...
Side effects of omega-3 supplements are usually mild. They include unpleasant taste, bad breath, bad-smelling sweat, headache, and gastrointestinal symptoms such as heartburn, nausea, and diarrhea. Several large studies have linked higher blood levels of long-chain omega-3s with higher risks of prostate cancer.
And even safe, low-dose fish oil supplements (though again, there’s no way to tell!) can have unpleasant side effects, including: A fishy aftertaste, including “fish burps.” Bad breath.
Side Effects. Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur:
The U.S. Food and Drug Administration (FDA) deems 5 g daily of omega-3 supplements, like fish oil, safe for most people. However, specific doses of fish oil may contribute to more or worse side effects and may differ if you live with specific types of heart disease.
Too much omega-3 side effects can more commonly include a fishy aftertaste, bad breath, indigestion, nausea or loose stools. More concerning but less common omega-3 side effects can include abnormal bleeding, compromised immune function and vitamin A toxicity (cod liver oil).
Lower levels of fats called triglycerides in the blood. Lower the risk of irregular heartbeats. Try to eat at least two servings a week of fish, especially fish that's rich in omega-3 fatty acids. Doing so appears to reduce the risk of heart disease, particularly sudden cardiac death.