This case study explores the processes and key actors behind the successful integration of multiple micronutrient supplements (MMS) for pregnant women into Bangladesh’s public health strategies and policies. It outlines the steps taken, including creating technical guidelines and engaging stakeholders to address concerns. The study highlights the influence of evidence from MMS trials on national strategies. It also emphasizes the roles of high-level political leaders, mid-level bureaucrats, scientists, and grass-roots implementers. Key factors in the success included leveraging evidence-based recommendations, collaboration platforms, global guidance, lessons from past experiences, and empowering advocates. Ethical considerations and methodological rigor underpin the findings, providing a robust framework for understanding the Bangladesh policy development process.