Gypenosides health benefit

Gypenosides are saponins extract derived from Gynostemma pentaphyllum Makino, also known as Jiaogulan. Gypenosides have been used for treating hepatitis and cancer in Asia, particularly China. Gypenosides inhibit the onset and improve the recovery of liver fibrosis induced by CCl(4) in rats.

Gypenosides and grape seed extract for diabetes
A combination of grape seed-derived procyanidins and gypenosides alleviates insulin resistance in mice and HepG2 cells.
J Food Sci. 2009 Jan; College of Food Science and Nutritional Engineering, China Agricultural Univ., Beijing, China.
This study investigated the effects of grape seed-derived procyanidins, gypenosides, and combination procyanidins/gypenosides on insulin resistance in mice and HepG2 cells. Our data suggest that the combination of gypenosides and grape seed-derived procyanidins may have functional efficacy in consumers with insulin resistance.

Gypenosides and cancer cell death
Gypenosides induce apoptosis in human hepatoma Huh-7 cells through a calcium/reactive oxygen species-dependent mitochondrial pathway.
Planta Med. 2007 June. School of Post-baccalaureate Chinese Medicine, China Medical University, Taichung, Taiwan, Republic of China.
We have previously reported that gypenosides induce apoptosis in human hepatocarcinoma Huh-7 cells through a mitochondria-dependent caspase-9 activation cascade. In order to further explore the critical events leading to apoptosis in gypenoside treated cells, the following effects of gypenosides on components of the mitochondrial apoptotic pathway were examined: generation of reactive oxygen species (ROS), alteration of the mitochondrial membrane potential (MPT), and the subcellular distribution of Bcl-2 and Bax. We propose that the rise in intracellular Ca(2+) concentration plays a pivotal role in the initiation of gypenosides triggered apoptotic death.

Which are more potent as antixodiants, catechins from green tea extract or gypenosides from Jiaogulan?
    We have not seen studies comparing them.