Dr. Oz says there are many healthy oils, such as olive oil, sesame seed oil, flaxseed oil, grape seed oil and canola oil. To maximize their health benefits, Dr. Oz says good oils need to be used properly. "Keep it in a dark bottle or in your refrigerator—that's how to keep it healthy so it doesn't go rancid," says Dr. Oz. "Healthy oils are delicate, you have to treat them delicately."
Dr. Oz also says overheating good oils during cooking can damage them. "Don't cook the oil, cook the food," says Dr. Oz, "which means put a tiny bit of oil in the pan, put the food in the oil and then put the food with the oil on it in the pan—that way the oil is preserved. It doesn't heat up and it doesn't get damaged by the heat."