Abstract: Every living organism needs food to live. Foods have many nutrients such as carbohydrates, fats, proteins, vitamins, or minerals. These nutrients present in food are ingested and assimilated by an organism to produce energy, stimulate growth and maintain life. Food chemistry is the study of chemical processes and interactions of all biological and non-biological components. The food has limited shelf life, in order to increase the shelf life and maintain the quality certain preservatives are used these preservatives may have some harmful effects so if possible, and foods without preservatives may be used