BMJ - Protein Sources & Breast CA

 "Dietary protein sources in early adulthood and breast cancer incidence: prospective cohort study"
http://www.bmj.com/content/348/bmj.g3437
"Conclusion Higher red meat intake in early adulthood may be a risk factor for breast cancer, and replacing red meat with a combination of legumes, poultry, nuts and fish may reduce the risk of breast cancer."