A compound in carrots may be a potent cancer fighter, reducing malignancies in rats by a third, a European study claims. "One of the natural pesticides in carrots is responsible for the cancer-preventing effect of carrots," said researcher Kirsten Brandt, a senior lecturer at the University of Newcastle upon Tyne, in England. "We now have identified a compound which seems to have an effect that can explain this benefit." Falcarinol, a compound that protects the vegetable from fungal diseases, may be the prime reason carrots are so unfriendly to cancers.