In a study from Sun Yat-sen University, scientists found that a diet high in omega-3 is associated with a reduced risk for breast cancer among women in China.
They examined the associations between breast cancer risk and intake of omega-3 in Chinese women, including 1,589 cases and 1,621 age-frequency-matched controls.
A validated food frequency questionnaire was used to assess dietary data.
The researchers found an association between a higher intake of fatty fish high in omega-3 and a lower risk for breast cancer.
Foods high in alpha-linolenic acid, eicosapentaenoic acid, docosapentaenoic acid, and docosahexaenoic acid also were linked with a lower breast cancer risk.
These benefits were stronger for younger women and women with estrogen receptor (ER)-positive, progesterone receptor (PR)-positive, and ER-positive PR-positive tumors.
The team also found in obese/overweight women, but not in women of normal weight, a reduced risk for breast cancer was strongly linked to increasing omega-3 intake.
Researchers say this study highlights the effect of lifestyle habits and, specifically, dietary intake of polyunsaturated fatty acids on breast cancer risk.
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The study was conducted by Zhuo-Lin Zhang et al and published in Menopause.
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