Protein intake and the risk of premenstrual syndrome

To examine the relationship between protein intake and the risk of incident premenstrual syndrome (PMS).Nested case-control study. FFQ were completed every 4 years during follow-up. Our main analysis assessed protein intake 2-4 years before PMS diagnosis (for cases) or reference year (for controls). Baseline (1991) protein intake was also assessed.Nurses' Health Study II (NHS2), a large prospective cohort study of registered female nurses in the...