There’s moderate evidenceTrusted Source that omega-3 may help reduce the severity of and mortality from heart disease
In fact, researchTrusted Source suggests that people with certain mental health conditions have lower omega-3 blood levels, and having more omega-3s may help prevent the onset or improve the symptoms of some mental health conditions like depression.
Furthermore, eye health begins to decline in old age, which can lead to age-related macular degeneration (AMD). Eating fish is linked to a reduced risk of AMD, but the results from fish oil supplements are less convincing
That said, fish oil supplements can help reduceTrusted Source joint pain, stiffness, and medication needs in people with rheumatoid arthritis, which causes pain in the joints.
Omega-3s are important for early growth, particularly during the first trimester of pregnancy, as well as beyond.
A number of neurodevelopmental conditions in children, such as attention deficit hyperactivity disorder (ADHD), involve hyperactivity and inattention.