Why does milks texture change when it goes of

Question: Why does milks texture change when it goes of
- Keywords:
  milk,
  texture
Asked by Em12 to Ciara, Elaine, Golnaz, Gonzalo, Yannis, Yvonne on 15 Nov 2017.
- Ciara O'Donovan answered on 15 Nov 2017:
  
  This is because when milk goes off it is caused by lactic acid bacteria growing in the milk (they are in the milk already and do not harm us!). When the lactic acid bacteria start to grow it uses the sugar in milk (called lactose) and creates lactic acid. This results in the pH of the milk dropping (as an acid is created!) and this causes the milk protein (called casein) to clump together creating a change in texture. This is actually the process by which cheese is made more or less!
- Gonzalo Delgado-Pando answered on 15 Nov 2017:
  
  Exactly! When the acid is created the milk proteins coagulates and stops being in the milk by precipitating, so the texture change appear.

Question: Why does milks texture change when it goes of