For the study, 35,016 women (ages 50 to 76) were surveyed about their use of supplements. Results revealed that those who used fish oil supplements had a reduced risk for breast cancer. However, use of the following supplements was not linked to a lower risk of breast cancer: black cohosh, dong quai, soy, and St. John's wort. It's possible that fish oil supplements may protect against breast cancer by curbing inflammation, according to the study's authors.
Rich in anti-inflammatory substances known as omega-3 fatty acids, fish oil has been found to fight against several other inflammation-related conditions in previously published studies. For instance, upping your fish oil intake may help treat asthma, inflammatory bowel disease, diabetes, and rheumatoid arthritis.