Weed might nearly quadruple a person's risk of developing type 2 diabetes , a new study says. People who use cannabis have a 3.7 times greater risk of type 2 diabetes compared to the general population, researchers reported Monday at a meeting of the European Association for the Study of Diabetes in Vienna. "As cannabis becomes more widely available and socially accepted, and legalized in various jurisdictions, it is essential to understand its potential health risks," said lead researcher Dr.