'The vast majority of recent research on cinnamon has to do with controlling diabetes and various related conditions. So, let’s start with one of the central concerns involving blood sugar.
Cinnamomum zeylanicum [true cinnamon] is a popular kitchen spice widely investigated for insulin potentiating effects. Researchers in India investigated water soluble polyphenols (oligomeric procyanidins) to evaluate their effect on insulin and blood sugar.
The polyphenol enhanced extracts were shown to be safe, while offering good antioxidant potential. The diabetic rats that were treated with the polyphenol enhanced extracts experienced reduced blood sugar during the 30 day experiment.'