Hi Bharat,
A warning about grinding cinnamon. There are two main types of "cinnamon" sold in the shops - one that is sometimes called true cinnamon, or Sri Lankan cinnamon or Indian cinnamon (Cinnamomum verum, synonym C. zeylanicum) and comes in wafery quills that are quite easy to grind into a powder. Tests have shown that this has little effect in reducing blood sugar.
The other type is cassia or Chinese cinnamon (Cinnamomum aromaticum, or Cinnamomum loureiroi) or Burmese cinnamon (Cinnamomum burmannii). These are the ones that are normally sold in supermarkets in powdered form and by health food shops as powder or capsules. It is only cassia that is known to reduce blood sugar. If you tried to grind a cassia quill it would damage your grinder - they need very powerful commercial grinders.
So the rule is - if you can grind it then its true cinnamon and ain't gonna help you. If you can buy it ready ground then it is almost certainly cassia and might help you. Another giveaway is the price - cassia is much more common and much cheaper than cinnamon.