What are side effects of fish oil?
- A fishy aftertaste.
- Bad breath.
- Heartburn, nausea or diarrhea.
Does too much omega-3 cause gas?
Apart from diarrhea, high amounts of omega-3 fatty acids can also lead to acid reflux, bloating, belching, gas and stomach discomfort.
Can fish oil upset your gut?
Diarrhea is one of the most common side effects associated with taking fish oil, and may be especially prevalent while taking high doses. In fact, one review reported that diarrhea is one of the most common adverse effects of fish oil, alongside other digestive symptoms such as flatulence ( 10 ).