Oily fish is rich in omega-3 polyunsaturated fatty acids, which have been shown to reduce inflammation and potentially lower the risk of heart disease, cancer, and arthritis. Both white and oily fish are good sources of lean protein. White fish contains fatty acids, but only in the liver, and in smaller quantities.
Consuming oily fish can help protect against cardiovascular disease, according to the AHA. A study published by the American Physiological Society suggests that fatty fish oils can also protect the heart during times of mental stress.
A study published in the Annals of the Rheumatic Diseases journal linked an average daily intake of at least 0.21 grams (or 210 milligrams) a day of omega-3 with a 52 percent lower risk of developing rheumatoid arthritis (RA). Other research suggests that omega-3 fatty acids might protect against the future development of RA.
Among people who abuse alcohol, fish oil may offer protection from dementia. Brain cells that were exposed to a mix of fish oil and alcohol had 95 percent less neuroinflammation and neuronal death compared with brain cells that were only exposed to alcohol.
Mouth and skin cancers
Oily fish consumption may protect against early- and late-stage oral and skin cancers. Omega-3 fatty acid has been found to target and selectively inhibit the growth of malignant and pre-malignant cells at doses that do not affect the normal cells.
Sensory, cognitive, and motor development
Consuming oily fish during the last months of pregnancy can have positive effects on a child’s sensory, cognitive, and motor development, research suggests. The same study did not find that breast-feeding offered the same benefits.
The children of women who regularly consumed salmon during pregnancy may be less likely to show signs of asthma at the age of 2.5.
Protecting vision and memory
DHA can protect against vision loss. Scientists have identified a linkbetween oily fish consumption and a lower risk of vision loss in older people. A study published in PLOS One indicates that eating oily fish may improve working memory.
Breast and prostate cancer
One meta-analysis of nearly 900,000 women has linked a higher consumption of oily fish with a lower risk of breast cancer. However, another team found that men with high quantities of omega-3 oil in the their blood had a higher risk of prostate cancer.
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