But antioxidants are still good for you, right? Might as well load up on them anyway–it can’t hurt. Actually, if you already have cancer, it might hurt. According to some studies, antioxidant supplements might actually speed up the progression of cancer. …The reason seems to be that antioxidants can’t tell the difference between healthy cells and cancer cells, and will do their jobs everywhere. That leads to stronger, healthier cancer cells, too. In fact, those researchers think antioxidants might even enhance a cell’s ability to travel around the body. Which, when it comes to cancer, is very, very bad — that’s how it spreads.