Medical News Today reports that a recent study documented:
a 44 percent reduction of advanced colorectal tumors in the animals, and also revealed, for the first time, the molecular mechanism by which grape seed extract works to inhibit cancer growthApparently the grape seed extract increases the presence of Cip1/p21 protein in tumours which stops the cell cycle, killing the cancer.
So here's the next problem. I'm pretty sure I saw grape seed extract in the supplements aisle at Safeway last week, but the article states that:
With these results, we are not suggesting that people run out and buy and use grape seed extract. That could be dangerous since so little is known about doses and side effectsI'll have mine by noon tomorrow.