Bajalan Z, et al. – Researchers reviewed data on nutritional factors affecting primary dysmenorrhea via analysis of relevant observational studies that reported on this topic. A total of 38 articles met inclusion criteria and were included for final data synthesis. Outcomes suggested less menstrual pain in association with the increased consumption of fruits and vegetables as the sources of vitamins and minerals, as well as fish and milk and dairy products. Furthermore, negative associations were indicated with meal-skipping and following a diet to lose weight with the severity of dysmenorrhea. Due to methodological heterogeneities for assessing nutritional habits and different methods of measuring dysmenorrhea pain, there were a few studies that reported inconclusive findings.