Extract from a plant in the Zingiberacae family that has research showing it has soothing and antioxidant activity when taken orally and when applied to skin. When applied topically, however, the oil can be a skin sensitizer due to the fragrance compounds it contains.
References for this information:
Bioscience, Biotechnology, and Biochemistry, June 2011, pages 1,067-1,072
Planta Medica, December 2007, pages 1,525-1,530