Cinnamon - oil with its warm, spicy, sweet, scent, has been used for centuries. It was the most sought after spice of the 15th and 16th centuries--at one time it was more valuable then gold. It is great for circulation and sore muscles. A powerful antiseptic, cinnamon oil is great for oily complexions. Aromatherapy Properties: a physical and emotional stimulant, increases libido and helps relieve depression. Researchers found that just having the aroma in the room reduces drowsiness, irritability, and the pain and frequency of headaches. In one study, it helped the participants concentrate and perform better on mental work.