Is mainstream medical science ignoring an inexpensive, painless, readily available cure for cancer? Mark Levine mulls this loaded question. The government nutrition researcher has published new evidence that suggests vitamin C can work like chemotherapy - only better. But so far, he hasn't been able to interest cancer experts in conducting the kind of conclusive studies that, one way or the other, would advance treatment. "If vitamin C is useful in cancer treatment, that's wonderful. If it's not, or if it's harmful, that's fine, too," said Levine, a Harvard-educated physician at the National Institute of Diabetes and Digestive and Kidney...