What are the major side effects of omega-3?
1. Bleeding risk
Omega-3 fatty acids are generally safe, but they can have side effects when consumed in high doses. One potential risk, as noted by the Cleveland Clinic, is an increased chance of bleeding, particularly with higher-dose prescription fish oil. This is because omega-3s act as natural anticoagulants, which means they can slightly reduce blood clotting by affecting platelet function.
A recent review published in May 2024 in the peer-reviewed Journal of the American Heart Association examined whether omega-3 supplements increase bleeding risk, specifically in relation to dosage and concurrent use of blood-thinning medications. Researchers analyzed data from 11 randomized clinical trials with 120,643 participants up to May 2023.
The study found that omega-3 polyunsaturated fatty acids (PUFAs) generally do not increase bleeding risk. However, those taking high doses of purified eicosapentaenoic acid (EPA), a specific type of omega-3, may face a slight increase in bleeding riskthough this effect is minor and likely not clinically significant.
Before starting an omega-3 supplement, it’s important to consult your healthcare provider, especially if you have a history of bleeding disorders, are taking blood-thinning medications, or have an upcoming medical procedure. Your doctor can advise on the safest dosage or suggest alternatives to help minimize any potential risks.
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