What is a common side effect of omega-3 fatty acids?

A common side effect of omega-3 fatty acids is the fishy aftertaste. This effect occurs due to the source of omega-3 fatty acids, which is often derived from fish oil. When ingested, some people might notice a distinct taste in their mouth, which can linger after consumption. This side effect is usually mild and often manageable by taking the supplements with food or choosing enteric-coated capsules designed to dissolve in the intestine rather than releasing in the stomach, which can help reduce the fishy taste.

While nausea, drowsiness, and headaches can occur with certain medications and supplements, they are not as commonly associated with omega-3 fatty acids as the fishy aftertaste. The prevalence of the fishy aftertaste highlights an important consideration for patients choosing omega-3 supplements, particularly those who might be sensitive to taste changes or are looking for formulations that minimize this side effect.