The study was published this week in Pediatrics journal and included over 90,000 women. The women started the study in 1991 and averaged ages 27 to 44. They recorded their regular diet or the past year and then seven years later about half of them were asked to complete the same survey about what they consumed while in high school.
The study follow up occurred in 2011 and researcher Sergio Cortes found that out of the 44,000 a total of 2,800 was diagnosed with breast cancer. Out of these 1,100 filled out the high school diet part of the survey. The research looked at control factors such as age at onset of menstruation, family history of breast cancer, and smoking and still found that those with a higher intake of fiber while a teen had a much lower risk of breast cancer.
In fact, those that ate a high amount of fiber throughout their late teens and early twenties had a 19% lower risk of developing breast cancer compared to those that ate a small amount of fiber.