Choi EK, Won YH, Kim SY, Noh SO, Park SH, Jung SJ, Lee CK, Hwang BY, Lee MK, Ha KC, Baek HI, Kim HM, Ko MH, Chae SW.

Supplementation with extract of Gynostemma pentaphyllum (Parsley gynostemma) leaves reduces anxiety in healthy subjects with chronic psychological stress: A randomized, double-blind, placebo-controlled clinical trial. Supplementation with EGP reduced "anxiety proneness" in subjects under chronic psychological stress, as shown by a decrease in the score of T-STAI and the tendency for decrease in the total score of STAI.