How long does UHT/Long life milk last once opened?

UHT milk or long-life milk has a typical shelf life of six to nine months at ambient temperatures if unopened. Once opened, it should be refrigerated and used within seven days.

Last updated 30/04/2021

(UHT) ‘ultra-heat treatment’ milk or long-life milk is heated to 140°C for two seconds, destroying any harmful bacteria and micro-organisms, which extends its shelf life. It is then packaged in a sterile container.

If not opened and stored in dry, ambient conditions with low light, it has a typical unrefrigerated shelf life of six to nine months. However, ensure you check the ‘best before’ date on pack for guidance.

Once opened it needs to be refrigerated and can be used normally within seven days.

To track this safely, mark the carton with the date it was opened and discard after seven days.

Long-life milk is available in full-fat, reduced-fat, low-fat, modified and skim.

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