What is food?  
  What happens to the food we eat?  
Our nutrient needs  
  Energy balance  
  Nutritional status  
  Laws & labels  
  Additives & colours  
  Toxicity in food  
  Processing food  
  Stability of food nutrients  
  Storage life of foods
  Food- associated health problems  

- Storage Life of Foods -

Frozen foods

The recommended maximum storage times shown in Figure 33 for foods in the home freezer are probably conservative.

If temperatures are carefully controlled at -18C and the food was initially of high quality then longer storage times can be achieved. However, most home freezers are used for freezing as well as storage. This results in temperatures rising above -18C, which decreases optimum storage life. Some deterioration in quality may have already taken place before the food is frozen; for instance it may have been left in a hot car while shopping. At -180C loss in quality is very much slowed but not completely stopped.

These slow changes, which limit the storage life, do not have a marked effect on nutrient content but eventually cause a noticeable change in eating quality. Frozen foods do not become unsafe to eat even if kept for many years at -180C (see here for safe handling of frozen foods).

To remain aware of storage time, each package should be marked with the date as it is placed in the freezer.

Food Facts
- Storage life of foods
Frozen foods
- Canned foods
- Home storage of food
33: Expected storage life for some frozen foods
34: Expected storage life for some canned foods
35: Home storage life for some ripe fruits
36: Home storage life for some ripe vegetables
37: Home storage life for some other foods