NCERT Class 11 Home Science Food Nutrition Health and Fitness



After completing this chapter the learner is able to —

• define the terms – food, nutrition, nutrients, health, fitness and the role of food and nutrition in maintaining health   

• understand the term, balanced diet and apply the concept in planning and consuming diets.

• understand the basis for defining the Recommended Dietary Allowances (RDAs) and the difference between Dietary Requirement and RDA.

• understand the basis for classifications of foods into appropriate groups.

• analyse the factors which influence adolescent food habits.

• identify the causes, symptoms and nutritional interventions related to eating disorders. 


The onset of adolescence brings with it many profound changes. The growth rate speeds up dramatically. This growth spurt occurs due to the activity of hormones that affect every organ of the body and this makes healthy eating very important. The nutrient needs rise throughout childhood, peak in adolescence and then level off or even diminish as the teenager becomes an adult. The saying ‘‘You are what you eat” seems to be proven true. We eat different kinds of food such as dal, chapatti, bread, rice, vegetables, milk, lassi, etc. All these different kinds of food provide us with nutrients to keep us healthy and active. It is important to know what food to eat in order to stay healthy. The science of food and nutrients and their action on our health is called Nutrition.
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