More than 246,000 women in the United States were diagnosed with breast cancer in 2015. Dr. Maryam Farvid of the Harvard School of Public Health noted that the results of most previous studies exploring the link between fiber intake and breast cancer risk have been unremarkable. She noted that these studies have generally focused on the diet of people in adolescence and early adulthood because this period is strongly associated with several risk factors for breast cancer. To overcome areas of research weakness, the researchers conducted a follow-up survey and data analysis of 90,534 women (participants in the Nurses 2 Health Study). The researchers collected information on the participants’ diets by questionnaire in 1991 (participants’ age range 27-44 years) and repeated the dietary questionnaire every 4 years. in 1998, the researchers administered another questionnaire to the participants regarding dietary intake in high school. farvid and his colleagues analyzed data related to dietary fiber intake in women and also assessed the incidence of breast cancer among the participants. The results showed that women with higher fiber intake had a 12-19% lower risk of breast cancer compared to women with lower fiber intake in early adulthood; women with higher fiber intake in adolescence had a 16% lower risk of breast cancer and a 24% lower risk of breast cancer before menopause. In addition, researchers found that the more fiber consumed in early adulthood, the lower the risk of future breast cancer, with an additional 10g of fiber per day (equivalent to an apple and two slices of whole wheat bread) reducing a woman’s risk of breast cancer by 13%. If women get fiber from fruits and vegetables, the risk of breast cancer is reduced even more.