The Mashhad University of Medical Sciences (MUMS) will be hosted again the International Clinical Nutrition Congress, on February 8-10, 2022; with the main topic “Hospital food and Patient Treatment”. Clinical nutrition services in Iran hospitals have witnessed remarkable progress over the past few years. Meanwhile, educating clinical nutritionists has also developed in nutrition colleges and departments. Clinical audits have shown that the most significant nutritional problems in hospitals across our country, are malnutrition and nutritional inadequacy. These problems necessitate the provision of nutritional services, preparation of clinical-therapeutic guidance and the application of the latest pharmaceutical and nutritional technologies. We hope that this conference will provide an opportunity to discuss and exchange the latest scientific and therapeutic achievements. We are looking forward to seeing you at the 4th International Clinical Nutrition Conference in Mashhad, Iran.