UNIT-1 BASIC ASPECTS

DEFINITION OF FOOD AND NUTRITION

FOOD can be defined as a substance consisting essentially a protein ,carbohydrate,fat and other nutrients used in the body of an organism to sustain growth and vital processes and to furnish energy

 NUTRITION can be defined as the science which deals with food and the various processes it undergoes before it becomes a part of our body.

The various processes are:-

•         Digestion

•         Ingestion

•         Absorption

•         Metabolism

•         Excretion

NUTRITION can also be defined as a science which deals with the study of the metabolic and physiological responses of the body to food and diet, including the role of nutrients in the cause, treatment and prevention of disease.

THUS  Nutrition-

  • Is food people eat and how body uses it.
  • Is scientific knowledge of human’s food requirement.
  • Deals with the study of food and diseases focusing on how diseases, conditions and problems can be prevented or lessened with a healthy diet.
  •  In addition, nutrition involves identifying how certain diseases, conditions or problems may be caused by dietary factors, such as poor diet (malnutrition), food allergies, metabolic diseases, etc.

IMPORTANCE OF FOOD IN MAINTAINING HEALTH        

  • Food provides Energy
  •  Food is required for Growth
  • Food is required for Prevention of Diseases/Well being of our body

IMPORTANT FACTS.

•                     Food is made up of different nutrients needed for growth and health.

•                     All nutrients needed by the body are available through food.

•                     Many kinds and combinations of food can lead to a well-balanced diet.

•                     No food, by itself, has all the nutrients needed for full growth and health.

•                     Each nutrient has specific uses in the body.

•                     Most nutrients do their best work in the body when teamed with other nutrients.

•                     All persons, throughout life, have need for the same nutrients, but in varying amounts.

•                     The amounts of nutrients needed are influenced by age, sex, size, activity, and the state of health.

•                     Suggestions for the kinds and amounts of food needed are made by trained scientists.

•                     The way food is handled influences the amount of nutrients in food, its safety, appearance, and taste. Handling means everything that happens to food while it is being grown, processed, stored, and prepared for eating.

IMPORTANCE OF FOOD 

•                     Physiological importance of food.

•                     Psychological importance of food and

•                     Social importance of food.


PHYSIOLOGICAL IMPORTANCE OF FOOD

It allows us to survive, grow, and reproduce as a newborn baby triples his/her birth weight by the first birthday and grows into a vigorous, healthy young adult. Such growth and vitality is largely dependent on right type of food .Mental ability has also been shown to be food related as poorly fed mothers give birth to mentally retarded  children or the ones with diminished brain power.

The amount and type of food required by an individual depend upon-

•         The age

•         Sex

•         Type of activity

•         Level of health And

•         Any physiological stress.

Different foods may serve all or any of the following purpose

1.provide energy

2.provide nourishment for Repair, maintenance and growth of various tissues of the body.

3.prevent Diseases.

4.allow regulation of bodily processes.

PSYCHOLOGICAL IMPORTANCE OF FOOD

It is of greatest concern to the consumer as the appetite is lost if the food is not to the liking of the person. The familiar foods as well as their quality attributes such as

•         Colour,

•         Appearance

•         FLAVOUR

•         Texture

•         Shapes

•         Size of helping and

•         Temperature at which served-determines their acceptability and palatability.

Food also meets strong psychological needs of the individuals.High quality foods have a prestige value as it reflects the affluence and status-consciousness of the individual.

SOCIAL IMPORTANCE OF FOOD

Food as we all know is a means of socializing. All get together and celebrations whether of family members or friends are enriched by serving special foods and a much larger variety than a routine meal. Even meetings, receptions and seminars have foods as the central unifying component. Business negotiations can occur at a special meal invitation.