@dorisena If you are consuming a lot of cinnamon you should consider switching to Ceylon cinnamon. I purchase it at Amazon but it is also available at Whole Foods. Ceylon cinnamon does not have coumarin in it which is something that can be harmful in large doses. The flavor of Ceylon cinnamon is very much milder so you can use more of it also. I use Ceylon cinnamon in my oatmeal and in my yogurt which are my two most frequent breakfasts. Ceylon cinnamon is also called "true cinnamon".
I find that my doctors will not say that cinnamon is helpful for diabetes, but I believe it is based on my own experience.

From healthline.com
Which type of cinnamon is healthiest?
Both Ceylon and cassia are healthy and delicious. However, if you intend to consume large amounts of this spice or take a supplement, cassia can be harmful because of the coumarin content. At the end of the day, Ceylon cinnamon is better quality and much safer.
Jul 15, 2016

Also a link with more detail about Ceylon cinnamon:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3854496/
JK