Study links marijuana use to poor blood sugar control in middle age

http://www.eurekalert.org/pub_releases/2015-09/d-slm091015.php

Public Release: 13-Sep-2015
Study links marijuana use to poor blood sugar control in middle age
Diabetologia

New research published in Diabetologia (the journal of the European Association for the Study of Diabetes) shows that current and former users of marijuana are more likely to have prediabetes--the state of poor blood sugar control that can progress to type 2 diabetes--than never users of marijuana. However the researchers, led by Mike Bancks (University of Minnesota School of Public Health, Minneapolis, MN, USA) failed to establish a direct link between marijuana use and type 2 diabetes.

•••••

The authors then did further analyses where marijuana use was assessed prior to the development or not of prediabetes. Over 18 years follow-up, a 40% greater risk for developing prediabetes (but not diabetes) was found for individuals who reported lifetime use of 100 times or more compared to individuals who reported never using marijuana. BMI and waist circumference did not affect the associations.

"It is unclear how marijuana use could place an individual at increased risk for prediabetes yet not diabetes," say the authors. But they suggest that it could be because individuals excluded from the study (due to missing information on important factors) generally had higher levels of marijuana use and greater potential for development of diabetes, or that marijuana may have a greater effect on blood sugar control in the prediabetic range than for full blown type 2 diabetes, when other traditional diabetes risk factor levels are exceedingly less favourable.

•••••