protein

• composition of protein

  1. carbon
  2. hydrogen
  3. oxygen
  4. nitrogen
• protein chain


  made up of amino acids and peptide links
• enzymes


  enzymes are substances that help chemical reactions
• HBV 


  high biological value: proteins that contain all or most of the amino acids the body needs, usually from animal sources
• LBV


  low biological value: protein that doesn't contain many essential amino acids, usually from plant sources
• sources: HBV


  -meat -yoghurt

  -fish -soya beans

  -eggs - meat alternatives (textured vegetable protein)

  -cheese -milk
• sources: LBV


  -peas -nuts

  -beans -cereals

  -lentils
• reference intake 


  0.75g per 1kg of body weight
• functions

  1. growth and repair of cells
  2. production of important hormones, enzymes, and antibodies
  3. produces heat and energy
• deficiencies

  1. poor or stunted growth
  2. slow healing of wounds
  3. hair breakage and loss
  4. poor general health
  5. hormone and enzyme imbalance