Cinnamon is a plant which is rich source of polyphenols that has been used for centuries in medicine and has been shown to affect insulin sensitivity and blood glucose by helping reduce the HbA1c because of its insulin potentiating activity. Diabetics and people with prediabetes can increase their insulin sensitivity by changing lifestyle, that includes proper nutrition and greater physical activity. Cinnamon has been the subject of many clinical and animal studies to ensure his effect on diabetes mellitus type 2, a chronic condition and one of the fastest growing health problems worldwide however it is necessary to have more clinical trials that will be long-term and involve a larger number of patients to evaluate effects of cinnamon supplementation. The aim of this thesis is to explain connection of cinnamon intake and blood glucose.