Antioxidants such as vitamin C found to spur cancer growth & metastasis

“We’ve found that antioxidants activate a mechanism that causes cancer tumors to form new blood vessels, which is surprising since it was previously thought that antioxidants have a protective effect,” said Martin Bergö, a new study’s author. “The new blood vessels nourish the tumors and can help them grow and spread.” It's worth noting that there's no harm in consuming normal antioxidant-rich foods in normal quantities, though.