Functions of food in human body, Physiological, social, Physiological Functions of food


Food has three main functions in the body

1) Physiological


3) Phychological

a) Physiological Functions

Food has three main physiological functions in the body

a) Growth and Development

b) Provision of Energy

c) Repair and Maintenance of Cells

a) Growth and development

Food helps babies, young children and adolescents grow at a rapid rate. While in adults and the elderly people most growth has stopped and nutrients are required in maintaining healthy state.

b) Provision of Energy

As a car needs fuel for work, our body needs food to carry out daily tasks and regulate body’s physiologic processes. When the body runs low on energy, humans feel fatigued and tired. In severe circumstances, a lack of energy may even lead to certain body processes shutting down. On the other hand, excess energy causes fat build up and can lead to obesity!

c) Repair and Maintenance of Cells

Good food is essential to maintain adequate health. E.g, Skin is often cut or grazed, hair falls out constantly and body’s red and white blood cells die on a regular basis. By consuming the right nutrients, body will repair itself and stay healthy. A healthy individual who eats well and exercise regularly is less likely to suffer from a cold or flu than a person who eats poorly and does not exercise.

2) Social

Functions Food is a symbol of hospitality and friendship throughout the world. Food creates a relaxed atmosphere

Food is used as an expression of love, friendship and social acceptance.

3) Psychological Functions

Consumption of food not only satisfies hunger, also gives happiness. Food is an outlet of emotion. People often eat more when they are tensed or happy.

Food is a source of security- people feel reasonably secure when they have enough food stored up.

The Food Pyramid

The Food Pyramid is designed to make healthy eating easier. Healthy eating is about getting the correct amount of nutrients – protein, fat, carbohydrates, vitamins and minerals needed to maintain good health. Foods that contain the same type of nutrients are grouped together on each of the shelves of the Food Pyramid. This gives a choice of different foods from which to choose a healthy diet. Following the Food Pyramid as a guide will help to get the right balance of nutritious foods within the calorie range

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