Cinnamon

One of the main reasons why cinnamon does not require refrigeration is because it has a low moisture content. Moisture plays a significant role in deteriorating the quality of spices by causing clumping or mold growth. By keeping cinnamon in a cool and dry place, such as your pantry or spice rack, you can prevent any moisture-related issues and ensure that your cinnamon remains fresh for longer periods.
Refrigeration can also have adverse effects on cinnamon’s characteristics. When exposed to cold temperatures, cinnamon tends to lose some of its essential oils that give it its distinctive aroma and taste.