How does cinnamon reduce blood sugar?

Cinnamon reduces blood sugar levels by lessening insulin resistance; however, this does not work as efficiently in people with type 2 diabetes, reports WebMD. For type 2 diabetes, this actually leads to higher blood sugar level.

People who have liver damage should be cautious if using cinnamon as it amplifies liver issues. Cinnamon supplements are categorized as food and do not have to be deemed helpful or safe, says WebMD. There are two types of cinnamon, including cassia and Ceylon. Cassia cinnamon is commonly used by researchers to conduct studies on the effectiveness of cinnamon on diabetes and in American kitchens for cooking, notes WebMD.