Cannabis use is linked to an almost quadrupling in the risk of developing diabetes, according to an analysis of real-world data from over 4 million adults, being presented at the Annual Meeting of the European Association for the Study of Diabetes (EASD) held in Vienna, Austria (15–19 Sept).
That seems likely, but right now the science is only correlative, not causative. This was just a big statistical analysis. Hopefully some focused mechanistic studies follow.