A study in the journal "BMJ" finds that a higher intake of fish oil seems to be linked to a reduced risk of breast cancer in later life.
It says that a high intake of fatty acids found in fish oil was linked with a 14 percent reduced risk of breast cancer in post-menopausal women.
Millions of Americans already take fish oil supplements for their heart health.
This research could be more reason for women to take them.
Nutritionists suggest one to two servings per week of oily fish such as salmon, sardines, and tuna.
