One of the components of licorice root extract that’s believed to give this plant its ability to help calm skin and minimize signs of sensitization. This component of licorice root also functions as an antioxidant and may play a role in brightening and improving the look of an uneven skin tone.
References for this information:
Evidence-Based Complementary and Alternative Medicine, January 2013, ePublication
International Journal of Toxicology, Volume 26, Supplement 2, 2007, pages 79-112
Bioorganic and Medicinal Chemistry, December 2003, pages 5,345-5,352
Immunology, January 1997, pages 115-120