A study shows omega-3 fats help fight fatigue that follows cancer therapy. Breast cancer survivors who eat a healthy dose of omega-3 fats — found largely in oily fish such as salmon, tuna and mackerel — may have some extra energy throughout their day, according to an American study. Many people treated for cancer have lingering fatigue even years after their therapy ends, and while there's evidence that good sleep habits and regular exercise can help, other options are still needed, said researchers whose findings appeared in the Journal of Clinical Oncology. Exactly what causes cancer survivors' long-term fatigue is unclear, but there's evidence that chronic inflammation in the body may play a role, said Rachel Ballard-Barbash of the US National Cancer Institute, who worked on the study. "Results link higher intake of omega-3 polyunsaturated fatty acids, decreased inflammation and decreased physical aspects of fatigue," Ballard-Barbash and her colleagues wrote. Omega-3 fats are thought to lessen inflammation, and research suggests that's especially true if the omega-3 replace some of the omega-6 fatty acids that make up a large share of the typical US diet. Omega-6 fats are found in margarine, vegetable oils and an array of snack foods, sweets and fast food. For their study, Ballard-Barbash and her colleagues looked at the relationship between omega-3 intake and fatigue among 633 breast cancer survivors. Overall, 42 per cent of the women were considered "fatigued" three years after their diagnosis — and the problem was more common in those with higher blood levels of an inflammation-related protein called CRP. Women who got more omega 3 in their diets had lower odds of fatigue, particularly if they used fish oil pills. Of women who got the most omega 3 relative to omega 6, at least partly from fish-oil supplements, about 23 per cent were considered fatigued. That compared with 49 per cent of women who did not use supplements and had the lowest omega-3 intake relative to omega 6. Of course, other factors may separate the fish and fish-oil lovers from other people. But when the researchers accounted for factors such as women's age, race and weight, higher omega-3 intake was still linked to lower odds of fatigue. "Consuming fish a couple times a week — particularly fatty fish — is already recommended, for overall health," said Ballard-Barbash, adding that women who are not physically active already should perhaps look into taking up an exercise routine to deal with fatigue. From: Gulfnews
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