How Coffee Protects Against Diabetes

Coffee helps increase the circulating amount of a protein called sex hormone–binding globulin (SHBG). This protein, according to research studies, has shown to be involved in the development of type 2 diabetes and it is also responsible for the testosterone and estrogen in the human body. Previous research has shown that coffee consumption prevents high-blood sugar and also improved insulin sensitivity. Consumption of decaffeinated coffee was not significantly associated with SHBG levels, nor diabetes risk. Coffee contains magnesium which is known to help with carbohydrate metabolism. Some studies have shown that antioxidants known as lignans or chlorogenic acids may be involved in helping to reduce diabetes.

Reference:

http://newsroom.ucla.edu/portal/ucla/why-coffee-protects-against-diabetes-190743.aspx

Arch Intern Med. 2006;166:1311-1316

Rachel Huxley; Crystal Man Ying Lee; Federica Barzi; Leif Timmermeister; Sebastien Czernichow; Vlado Perkovic; Diederick E. Grobbee; David Batty; Mark Woodward. Coffee, Decaffeinated Coffee, and Tea Consumption in Relation to Incident Type 2 Diabetes Mellitus: A Systematic Review With Meta-analysis. Arch Intern Med, 2009;