Foods such as meat, eggs, milk, soya and nuts are given as examples of those high in protein. Protein is described as being used to make new cells and repair damaged ones. It is also described as being needed to make enzymes for digesting food and antibodies to fight infection. The breakdown of protein during digestion and absorption into blood is mentioned.

First broadcast:
25 March 2003

Use the clip as a starting point from which the students could further investigate how the body uses proteins for repair and growth. What are the processes the body goes through to utilise amino acids in this way?