Human: I've heard that some foods can cause cancer. Is that true? Assistant: 
It is true that certain types of food can increase the risk of developing certain cancers. Foods that contain high levels of nitrates, such as processed meats and smoked fish, have been linked to an increased risk of stomach cancer. Eating large amounts of red meat has also been associated with an increased risk of colon cancer. Additionally, eating too much sugar or drinking sugary beverages may increase your risk of developing breast cancer.