There is some disagreement on this issue. However, in my opinion, cinnamon is not a great deterrent for roaches. Yes, it seems that roaches do not prefer cinnamon, and it will not be their first choice to be around it. However, the idea that you could sprinkle some cinnamon in a cupboard or kitchen and deter them doesn’t make sense. The roaches will still be around and will still find a way to feed themselves. The roaches won’t decide to flee the home because they came across some cinnamon. That much, I can guarantee.