[Correspondence] The urgent need for a diabetes data rights charter

Data generated by diabetes devices—including continuous glucose monitors, smart pens, and insulin pumps—are fundamental to the care and long-term health of people with diabetes. Yet, despite their centrality, users of these devices do not have full access to and control over their own data. Regulatory frameworks such as the General Data Protection Regulation in the EU and UK, and the EU Data Act, establish much needed rights for device users. However, in practice, mechanisms to exercise these rights are often missing.