The heartbreaking story of a 5-year-old child losing the battle against late-stage cancer has shaken many parents and health professionals. While cancer can have many causes—some genetic, others environmental—doctors are increasingly warning that diet plays a critical role in the development of chronic diseases, including cancer. In the wake of this tragedy, medical experts are urgently appealing to parents: be more mindful of what your children eat. Some foods, though widely consumed, are linked to increased cancer risks and may silently damage children’s health over time. Here are five foods doctors now advise parents to limit—or avoid altogether—for the sake of their children’s future health.

1. Processed Meats (e.g., sausages, ham, hot dogs)