Extract from a plant in the Zingiberacae family that has research showing it has soothing and antioxidant activity when applied to skin. When applied topically, however, the oil can be a skin sensitizer due to the volatile fragrance compounds it contains.
References for this information:
Natural Product Research, October 2012, pages 1,759-1,764
African Journal of Biotechnology, January 2012, pages 777-786