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  • 17% of the body is made of protein
  • Made up of several molecules- carbon, hydrogen, oxygen, nitrogen
  • They're arranged into units known as amino acids
  • These are joined together by peptide links
  • Essential constituent of all cells: hair, nails, organs and blood cells
  • Excess protein consumed is converted into energy
  • The body cant store protein therefore if it isn't burnt off it will turn into fat


  • Meat and meat products
  • Cereal and cereal products
  • Milk and milk products
  • Egg and egg dishes
  • Fish and fish dishes
  • Other foods
  • Vegetables
  • Potatoes and savoury snacks

Biological Value of Protein

  • Amino acids are building blocks of protein
  • Approxamately 22 different types
  • Essential amino acids
  • Non essential amino acids

Complementary Proteins

  • Biological value=measure of the protein quality
  • Low biolgocial Value=


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