Rennet does not need to be kept refrigerated at all times. However, it should be stored in the refrigerator to maximize shelf-life.

How do you store rennet?

Store liquid rennet in the refrigerator, each variety of liquid rennet will have a unique best used by date. When stored in the refrigerator, rennet will not go bad. Even past the 'best by date' it will simply loose potency over time.

What temperature does rennet work best at?

The optimum temperature for rennet enzyme is 40 - 42 C but usually a temperature of around 30-32 C is used because of other factors which will be explained later. The effect of pH can be seen from Figure 3 below. Secondary phase: Also called the coagulation phase.