A food is something that provides nutrients. Nutrients are substances that provide: energy for activity, growth, and all functions of the body such as breathing, digesting food, and keeping warm; materials for the growth and repair of the body, and for keeping the immune system healthy.
Food is the third most important thing for living beings to provide energy and development, maintain life, or stimulate growth after air and water. It is one of the most complicated sets of chemicals. Food plays an important role in the promotion of health and disease prevention. In general, it consists of essential nutrients, such as carbohydrates, proteins, fats, minerals and vitamins which are consumed to provide nutritional support for an organism and ingested by an organism and assimilated by the organism’s cells to sustain health. These nutritious foods are in the form of grains, pulses, fruits, vegetables, oils, etc.