NTRK1 and diabetes mellitus: Based upon these data, we concluded that the cinnamon is effective in reducing the high blood glucose, significantly decrease the live weight in the diabetic male rats, change the Trk-A levels, and it also causes an increase in the NGF levels in the islets of Langerhans and it may have positive effects by increasing the NGF levels on the treatment of diabetes disease and by hindering the complications depending on the diabetes.