- Gastrointestinal side effects: Fish oil supplements can cause belching, heartburn, nausea, and diarrhea. These side effects are usually mild and go away within a few weeks of taking the supplement.
- Bleeding risk: Fish oil supplements can increase the risk of bleeding, especially in people who are taking blood thinners or have a bleeding disorder.
- Allergic reactions: Some people may be allergic to fish oil supplements. Symptoms of a fish oil allergy can include hives, swelling, difficulty breathing, and anaphylaxis.
- Other side effects: Fish oil supplements may also cause other side effects, such as headache, fatigue, and muscle pain. These side effects are usually mild and go away within a few weeks of taking the supplement.
If you experience any side effects from fish oil supplements, talk to your doctor. They can help you determine if the supplement is right for you and recommend ways to reduce your risk of side effects.