Omega-3 fish oil may help to reduce the chance of irregular heartbeats, slow plaque development in the arteries, reduce triglycerides, lower blood pressure and reduce the odds of having a stroke or heart attack, according to WebMD. It may also decrease the chance of sudden cardiac death from heart disease.
Omega-3 fatty acids reduce swelling and help to eliminate pain. Some people may use omega-3 fish oil to treat or prevent mental disorders including ADHD, depression, psychosis and Alzheimer's, among others. Omega-3 fish oil supplements may also be used for glaucoma, dry eyes and age-related macular degeneration. Omega-3 fish oil may be taken by women to reduce the symptoms of premenstrual syndrome, breast pain and problems during pregnancy, states WebMD.
Omega-3 fish oil may be taken to treat or prevent diabetes, obesity, kidney disease and osteoporosis. Other uses include asthma, movement disorders, developmental coordination disorders, obesity and dyslexia. Some cancer patients take it to reduce weight loss, and it may also help with certain diseases that cause pain and swelling, notes WebMD.
Sometimes patients take omega-3 fish oil after heart transplant surgery to prevent kidney damage or high blood pressure. It may be taken in situations when rerouted blood vessels need to stay open, such as after coronary artery bypass surgery. When taken in low doses as directed, omega-3 fish oil is safe, although it may produce mild side effects, according to WebMD.