Expiration Dates and Shelf Life of Freeze-Dried Food
Freeze-dried food can have a long shelf life when it is properly packaged and stored. However, shelf life varies between products and manufacturers, so always check the Best Before date and storage instructions printed on the packaging.
How Long Does Freeze-Dried Food Last?
For commercially packaged freeze-dried foods, the manufacturer's stated shelf life is the best guide. Some specially packaged long-term emergency foods can have shelf lives of 25 years or more, while many outdoor meals have considerably shorter shelf lives.
Once a package has been opened, exposure to air and moisture can significantly reduce its shelf life. For the best quality, consume opened freeze-dried food according to the manufacturer's instructions and keep any unused food sealed and dry.
What Affects Shelf Life?
The main factors that can reduce the quality and shelf life of freeze-dried food are:
- Moisture: Exposure to humidity can cause freeze-dried food to absorb water, affecting its texture and quality.
- Oxygen: Oxygen can contribute to oxidation, particularly in foods containing fats.
- Heat: Higher storage temperatures can accelerate deterioration.
- Damaged packaging: Punctures, broken seals or other damage can allow air and moisture into the package.
For best results, store unopened freeze-dried food in a cool, dry place away from direct sunlight and keep the packaging intact.
What Does "Best Before" Mean?
A Best Before date indicates the period during which the manufacturer expects the food to retain its specified quality when stored correctly. It is different from a Use By date, which relates to food safety.
The Best Before date should always be considered alongside the manufacturer's storage instructions and the condition of the packaging.
What If the Food Is Past Its Best Before Date?
Do not use freeze-dried food if the packaging is damaged, swollen, leaking or otherwise compromised. If a product has passed its Best Before date, quality may have deteriorated even if the package remains sealed.
If the food has an unusual smell, visible mould, significant discolouration or an unexpected texture after preparation, discard it rather than eating it.
Always follow the manufacturer's instructions and the date marking printed on the individual product.