What are three ways to stop milk going off?

1. Refrigeration: Keeping milk at a low temperature slows down the growth of bacteria and other microorganisms that cause milk to spoil. Store milk in the refrigerator at or below 40°F (4°C).

2. Pasteurization: Pasteurization is a process of heating milk to a high temperature for a short time to kill harmful bacteria. Pasteurized milk can be stored for longer periods of time than unpasteurized milk.

3. UHT treatment: UHT treatment is a more intense form of pasteurization that involves heating milk to a higher temperature for a longer period of time. UHT-treated milk can be stored for even longer periods of time than pasteurized milk.