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Then you recall a news item about studies linking grilled food with an increased risk of cancer. So your anticipation is tempered with the awareness that a Dr. Killjoy somewhere has decreed that the encrusted burgers, ribs and steaks you enjoy so much may also be tumor generators. In actuality, the link between grilled foods and cancer in people is not well-established, according to Kathleen Newman, a registered dietitian at UC Davis Medical Center. HCAs have produced tumors in animal experiments, but no study has ever shown that HCAs produce cancer in people.