Chlorogenic acid is used as a food additive in coffee products, chewing gum and mint. It acts as an intermediate in the biosynthesis of lignin, which is an antioxidant.
Kamiyama, M.; Moon, J.; Jang, H. W.; Shibamoto, T. Role of Degradation Products of Chlrogenic Acid in the Antioxidant Activity of Roasted Coffee. J. Agric. Food Chem. 2015, 63 (7), 1996-2005.
Peng, H.; Kather, M.; Rubsam, K.; Jakob, F.; Schwanebwerg, U.; Pich, A. Chlorogenic Acid Biosynthesis Appears Linked with Suberin Production in Potato Tuber (Solanum tuberosum). J. Agric. Food Chem. 2015, 63 (19), 4902-4913.