Illegal. According to Article 83 of the Food Safety Law of People's Republic of China (PRC), food advertisements shall be true, accurate and clear, and shall not contain false or misleading contents. If food propaganda violates the above laws and regulations, it will be severely punished, including fines, ordering to stop advertising activities, withdrawing advertisements, and revoking advertising business licenses. Dietotherapy uses diet to regulate patients' health or treat diseases, and it is illegal to over-publicize the efficacy of dietotherapy. Dietotherapy is aimed at unhealthy people. Although food is still used as raw material, it focuses on the medicinal value of food.