Spicy Cinnamomum cassica from Sri Lanka smells good enough to eat. As a massage ingredient, cinnamon oil can be used to help alleviate tension, increase vitality and promote circulation. It also makes a superb environmental freshener. A cinnamon waterspray knocks mustiness out of the air in closed spaces and dark corners, leaving an earthy, clean aroma. This powerful essence should always be highly diluted with water or carrier oils and kept away from mucous membranes.