Wafa, Frenaya Putri Indira, Maira Ryu Lana Aghnaita, Siti Zaina Ikramullah, Amalina Khairunisa Mumtaz and Nadia Namira Mecca 2026. RISK FACTORS OF BREAST CANCER AMONG WOMEN OF REPRODUCTIVE AGE: A LITERATURE REVIEW OF OBSERVATIONAL STUDIES (2021-2026). Journal of Research in Pharmacy and Pharmaceutical Sciences. 5, 1 (Jun. 2026), 1–8. DOI:https://doi.org/10.33533/jrpps.v5i1.14065.