I put it on my oatmeal or on my toast in the morning. Sometimes I use it in my coffee or tea. I have been taking all of my regular meds along with it so I don't know how much it's helping. I just figure every little bit helps and use it. 1/4 tsp is not very much cinnamon so I don't really think you should have any problems unless you have tree allergies.
My daughter is allergic to trees and can't have cinnamon, allspice or maple syrup... But it's ok because she hates them all anyway!
"People are like stained glass windows: they sparkle and shine when the sun's out, but when the darkness sets in, their true beauty is revealed only if there is light within."
- Elizabeth Kubler-Ross