Vitis Vinifera Juice Extract
It's a liquid extract coming from grape. According to manufacturer info, it's a skin peeling agent, aka exfoliant, that contains a nice mix of AHA acids (if those magic three letters do not tell you anything, you must click here now.)
About 40% of the extract is a mix of tartaric, malic, lactic, citric and gluconic acid and they work to gently lift off dead skin cells to reveal nicer fresher skin underneath. The manufacturer also claims that the exfoliation with grape juice extract is very well tolerated and depending on the concentration the result can be soft or even strong exfoliation.