Consumption of omega-3 fatty acids does not reduce cancer risk

Reported by Susan Aldridge, PhD, medical journalist

A review of the evidence suggests it is unlikely that omega-3 fatty acids reduce the risk of cancer.
Previous research has suggested that diets high in omega-3 fatty acids - from oily fish, for instance - protect against certain types of cancer. Accordingly, various supplements have been developed to boost this protection through enhancing omega-3 intake.

A team in Santa Monica, California, has looked at all the research. They found a number of studies that suggested omega-3s could decrease the risk of breast, colorectal, lung, prostate and skin cancer. But other studies showed no such reduction or even an increse in risk. Overall, they conclude there is no credible evidence showing a role for omega-3s in reducing cancer risk. Supplementing your diet with fish oil capsules may have other benefits, but it won't protect against cancer.

Source
Journal of the American Medical Association 25th January 2006 Volume 295 pages 403-415