Dietary protein sources in early adulthood and breast cancer incidence: prospective cohort study

Objective To investigate the association between dietary protein sources in early adulthood and risk of breast cancer. Design Prospective cohort study. Setting Health professionals in the United States. Participants 88 803 premenopausal women from the Nurses’ Health Study II who completed a questionnaire on diet in 1991. Main outcome measure Incident cases of invasive breast carcinoma, identified through self...