Once the milk is rehydrated, we recommend to use or refrigerate within 2 hours (just like using thawed milk). Discard if unused after 24 hours in the refrigerator.
After you open a bag of your breast milk powder, remember to re-seal the zipper if any unused powder remains. The powder will rapidly start to attract moisture if left unsealed, which can lead to bacterial growth as your milk was not pasteurized during the freeze-drying process. For this reason, once the bag has been opened, it should be re-sealed, kept at room temp, and used within 3 days.