The group of women in a new study with the lowest rate of breast cancer consumed about four tablespoons of olive oil each day. Heather Rousseau/NPR hide caption

itoggle caption Heather Rousseau/NPR

Actress Rita Wilson arrives at the premiere of the documentary Fed Up in West Hollywood, Calif., in May 2014. Gus Ruelas/Reuters/Landov hide caption

itoggle caption Gus Ruelas/Reuters/Landov

The U.S. Preventive Services Task Force recommends mammograms every other year, while the American Cancer Society endorses annual scans. Kari Lehr/Image Zoo/Corbis hide caption

itoggle caption Kari Lehr/Image Zoo/Corbis

Catharine Becker of Fullerton, Calif., was diagnosed with stage 3 breast cancer at 43 despite having a clean mammogram. The mother of three didn't know she had dense breast tissue until after she was diagnosed. Heidi de Marco/Kaiser Health News hide caption

itoggle caption Heidi de Marco/Kaiser Health News

Some researchers recommend starting mammogram screening at age 40, while others say age 50. Some doctors think screening should be based on a woman's overall risk for breast cancer, not just her age. Hero Images/Corbis hide caption

itoggle caption Hero Images/Corbis

It's a good start when experimental compounds stop the proliferation of cancer cells in the lab. But, as many researchers have learned the hard way, that's just an early step toward creating a worthwhile treatment. Science Source hide caption

itoggle caption Science Source

Mary Harris was relieved when Stella was born with a mop of thick black hair, as if she had been protected from the chemo somehow. Courtesy of Howard Harris hide caption

itoggle caption Courtesy of Howard Harris

Radiation therapy is effective in treating breast cancer but typically requires dozens of visits over five to seven weeks. A newer protocol takes just three weeks. Antonia Reeve/Science Source hide caption

itoggle caption Antonia Reeve/Science Source

Women participate in a breast cancer fund-raising in Denver in 2011. Despite decades of awareness campaigns, the survival rate for women with metastatic breast cancer hasn't improved. Helen H. Richardson/Denver Post/AP hide caption

itoggle caption Helen H. Richardson/Denver Post/AP

Coalitions of patient advocates now help steer research funding toward particular projects. Lilli Carré for NPR hide caption

itoggle caption Lilli Carré for NPR

Lisa Schlager of Chevy Chase, Md., demonstrates outside of the Supreme Court as arguments were made in a case seeking to determine whether the BRCA breast cancer genes can be patented. The court ruled in 2013 that individual genes can't be patented. Tom Williams/CQ Roll Call/Getty hide caption

itoggle caption Tom Williams/CQ Roll Call/Getty