Ultra-processed foods are defined as multi-component industrial formulations that include chemical food additives in food production where sugar, salt, oils and fats are the main products. General production purposes of ultra-processed foods are to obtain low-cost and mass production, long shelf-life and branded products. NOVA Group 4 classification is used to express ultra-processed foods. Packaged snacks (chips, cake, crackers, candy, etc.), frozen products, meat and chicken extract products (bouillon, powder mixtures), processed meat products (hot dog, nugget star), fizzy drinks, beverages, packaged milk and cocoa drinks, etc. constitute ultra-processed foods. Excessive consumption of ultra-processed foods, especially those containing free sugar, causes the intake of empty calories and causes insufficient intake of some essential nutrients. Also, ultra-processed foods increase the energy density, sugar, saturated fat and trans fatty acid levels of the daily diet. A high-energy-density diet causes an increase in people's body weight. In addition to these results, chronic diseases such as diabetes, cardiovascular diseases, hypertension, kidney diseases, and colon, rectal and breast cancer may occur due to insufficient fibre intake and obesity. Therefore, in response to the development of the global food industry, countries should develop their own national policies and work to reduce the consumption of ultra-processed foods for public health.