DBC played a leading role in advocating for reform of Canada’s preventive health guideline development process. Through parliamentary committee testimony, meetings with the Public Health Agency of Canada, and sustained advocacy, DBC raised concerns about governance, transparency, evidence review, and the lack of expert and patient involvement in developing breast screening guidelines. In March 2025, the federal government suspended the Canadian Task Force on Preventive Health Care and launched a comprehensive review. On June 10, 2026, the Task Force was officially replaced by the National Advisory Committee on Preventive Health Services, a new body designed to strengthen the development of preventive health guidance in Canada through greater transparency, accountability, expertise, and patient engagement.