This study aims to assess the importance and diversity of food substitutes. Food substitutes serve as alternatives for foods that cannot be consumed due to conditions such as obesity, diabetes, celiac disease, heart and cardiovascular disorders, etc. Additionally, food substitutes contribute to extending product shelf life, improving texture and flavor characteristics, and enhancing nutritional value. These substitutes play a critical role in meeting consumer demands, increasing product quality, and improving production processes. Research focusing on meat and dairy alternatives has shown significant growth in recent years, and studies on gluten-free and egg substitutes have yielded promising results.... However, concerns regarding carbohydrate and sugar substitutes highlight the need for further research. Moreover, with the advancement of new technologies, the range of products is becoming more diverse in terms of texture, taste, and flavor. Nonetheless, the careful selection and use of various substitutes used in the food industry, such as colorants, sweeteners, preservatives, antioxidants, thickeners, and flavor enhancers, are essential for enhancing the quality of food products.