Green (unroasted) coffee extract seems to reduce swings in blood sugar in healthy people, and might offer some benefit to those at risk for type 2 diabetes. The research is still preliminary, though, since it included only 30 individuals who were of normal weight, without diabetes.
The green coffee extract lowered their blood sugar responses in a glucose tolerance test, with higher doses exerting more effect. Previous epidemiological studies have suggested that coffee consumption is associated with a lower risk of developing type 2 diabetes, while a small study published in 2012 suggested that green coffee extract might be helpful in weight loss.
[American Chemical Society in New Orleans, April 9, 2013]
The possibility that green coffee extract would help prevent a post-meal rise in blood sugar is made more plausible by the fact that cinnamon, nopal cactus leaves and vinegar can all help prevent such a rise.
