“…Grape seed proanthocyanidins (GSP) is a general term for a large class of polyphenolic compounds that have antioxidant activity. GSP has various biological activities and has been proven to have good antitumor effects, as well as certain inhibitory effects on cervical cancer (Li et al, 2022a), carcinoma of the urinary bladder (Yang et al, 2021a), lung cancer (Xu et al, 2021a;Mao et al, 2023), colon cancer (Aiello et al, 2019;Zhang et al, 2019), liver cancer (Feng et al, 2019), prostate cancer (Chen and Yu, 2019), among others. In a study on liver cancer cells, GSP was found to trigger ROS production, decrease matrix-metalloproteinases (MMPs), and increase caspase-3 activity in HepG2 cells (Wang et al, 2020), proving that GSPs may induce ROS production and, consequently, lead to MMP reduction and caspase-3 activation.…”