Prepared infant formula can safely sit out at room temperature for up to 2 hours if it has not been fed from; once a baby starts drinking from the bottle, the formula should be used within 1 hour and any leftovers discarded to avoid bacterial contamination
. If you prepare formula but do not plan to use it immediately, it should be refrigerated within 2 hours of preparation and can be stored in the refrigerator for up to 24 hours
. Formula should never be frozen, as freezing can degrade its quality
. In summary:
- Prepared formula at room temperature (unfed): up to 2 hours
- Prepared formula at room temperature (after feeding started): use within 1 hour, then discard
- Prepared formula refrigerated: up to 24 hours
- Powder formula (unopened): until expiration date, stored in a cool dry place
- Ready-to-feed or liquid concentrate formula (opened): refrigerated up to 48 hours if covered
These guidelines help ensure formula safety and reduce the risk of spoilage or bacterial growth.
