While cinnamon and honey can provide some relief from cold and flu symptoms, no evidence supports that they are effective in curing or preventing the common cold or flu, according to About.com Health. Honey, the most effective of the two, can help ease a sore throat and cough.
Honey is given to children to prevent night time coughing, and it has been rated higher than cough suppressants available over-the-counter for children, according to About.com Health. Because it can cause botulism in young children, honey should never be given to kids under 1.
Cinnamon has little proven efficacy in treating cold and flu symptoms, though it is widely used in natural medicine, according to About.com Health.