Background: The risk and burden of diabetes is greatest among vulnerable populations such as people living with mental health and substance use disorders. However, there is a paucity of research examining Type 2 diabetes (T2D) risk in this population. There is a wealth of research in health risk communication which suggest the effectiveness of message framing and tailored risk feedback; however, little is known about their potential utility when used concurrently for T2D prevention in people with substance use problems. Methods: Study 1 was a systematic review, comprised of 5 empirical studies...