Foreign Compounds: Foods, Drugs, Chemicals, and Lifestyles

Foods are substances that contain essential nutrients such as proteins, carbohydrates , and minerals to provide energy and maintain life. Drugs are chemical substances that produce biological effects that affect how the body works. A medicine is used in the treatment, diagnosis, or prevention of a disease. Chemical compounds are a major part of the dairy and pharmaceutical industries. They are also used for preservation in the food industry. Fertilizer chemicals are applied to accelerate the growth of crops , while alcohol and cigarettes are lifestyle substances.