Salmon, sardines, mackerel, herring and tuna are heart-healthy fish. All of them contain high concentrations of omega-3 essential fatty acids. Essential fatty acids are things that your body needs to function properly, but you have to eat foods containing them to get them.
Omega-3 fatty acids are particularly good at reducing the risk of heart attack and stroke. Eating fish high in these fatty acids reduces the symptoms of high blood pressure, thins the blood and prevents clots. It also steadies your heart rate and decreases triglyceride levels.
Eating oily fish also protects against macular degeneration, an age-related condition that leads to vision loss, and promotes healthy brain function. It's even been linked to relieving depression.
Regularly eating fish rich in omega-3 fatty acids may keep you from developing asthma and rheumatoid arthritis. That's because fish oil has an anti-inflammatory effect, and it works directly on your immune system. Fish oil also may fight colon and breast cancer, and it can reduce spread where it's already established [source: University of Maryland].
The name of next superfood provokes confusion, but there's no doubt about its health benefits.