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Cinnamon's most notable and studied benefit to the immune system has been its ability to lower blood sugar.
A U.S. Department of Agriculture study found that the Christmas-y spice could lower blood sugar by 13 to 23 percent. The author of that study suspected that had to do with cinnamon's antioxidants, which activate insulin receptors in your cells.
A German study showed that it could suppress Escherichia coli (E. coli) bacteria, the cause of most urinary tract infections, and Candida albicans, the fungus responsible for vaginal yeast infections.
Duke adds that friends of his have successfully quit smoking by sucking on cinnamon sticks whenever they had the urge to smoke. Add a teaspoon to your morning oatmeal or to a glass of organic apple cider.