Food and Nutrition- Nutrients

Food and Nutrition
Nutrients

, Food and nutrition

All the nutrients needed by the body are available in the food ingested

Nutrients are essential for:
-> tissue building, growth and repair
-> energy supply
-> protection against diseases

Macronutrients:
Required in large quantities




Billiance
proteins, carbohydrates, lipids (fats and oils)

Micronutrients:
Required in smaller quantities
minerals and vitamins



Macronutrients

Proteins
Amino acids area the building blocks of all proteins
20 different amino acids that build thousands of different proteins

Essential amino acids
-> 9 that cannot be produced by the body
-> ingested in daily diet

Non-essential amino acids
-> amino acids that can be produced by the body Protein chain

Classification of proteins

Complete
-> contain all 9 essential amino acids
-> high biological value- ensure growth and repair of body cells
-> sources: animal origin and soybeans

Incomplete
-> lack essential amino acids
-> low biological value- cannot support growth
-> sources: legumes, seeds, nuts