You may've already heard about olive oil’s positive role in heart disease prevention, but a new, large-scale study has shown it may also be a powerful weapon against breast cancer.

Spanish researchers put a group of 4,200 older women with an average BMI of 30—which is considered obese—on the Mediterranean diet (lots of vegetables, grains, fruits and legumes, with generous portions of fish and very little meat). They then split the cohort into two subgroups, one of which was asked to supplement their meals with four tablespoons of olive oil per day, while the other was allotted an ounce of walnuts, hazelnuts and almonds per day.

Even though the study was partially bankrolled by the nut industry, the olive oil group won out. "We found a strong effect of a long-term dietary intervention with the Mediterranean diet and extra virgin olive oil on breast cancer incidence," said Dr. Miguel Angel Martinez-Gonzalez, a researcher at the University of Navarra in Pamplona, Spain.

Over the six-year study period, the olive-oil group was 68 percent less likely to develop breast cancer. Scientists in the study speculate that something in olive oil may inhibit the growth of breast cancer by targeting abnormal cells. Considering how great olive oil is for you, start incorporating a bit into your daily diet if you aren't already. What are your favorite recipes that include olive oil?

You can read the article here: Olive Oil Might Cut Breast Cancer Risk