Fish oil may fight breast cancer
Other over-the-counter supplements fail to show protection
By Nathan Seppa
A large survey of postmenopausal women has found that fish oil may guard against breast cancer. Although the study wasn’t designed to show a cause-and-effect relationship, it sets the stage for an upcoming trial of fish oil consumption that may clarify the issue.
Meanwhile, 14 other over-the-counter dietary supplements had their hopes dashed, showing no apparent benefit against breast cancer, researchers report in the July Cancer Epidemiology, Biomarkers and Prevention.
While other studies have found that fish oil supplements or a diet high in fish shows promise against cardiovascular ailments, (SN: 2/15/97, p. 101) the new study is the first to suggest a link between fish oil and a lower risk of breast cancer, says study coauthor Emily White, an epidemiologist at the University of Washington and the Fred Hutchinson Cancer Research Center in Seattle.
White and her colleagues used data from a massive survey of women in western Washington who filled out questionnaires between 2000 and 2002 regarding their diet, supplement intake, exercise habits and overall health and lifestyle. The analysis included more than 35,000 postmenopausal women ages 50 to 76 who didn’t have breast cancer at the study outset. By the end of 2007, 880 of these women had developed breast cancer.