Yes. Breast milk lasts 4 days in the fridge and 6–12 months in the freezer. After that, or sooner if stored badly, it spoils: watch for the signs below.
How to tell if breast milk is bad
Smell
Sour or off smell in prepared formula or food.
Texture
Separation that does not mix back, or clumps.
Colour
Change from the usual colour.
Seal
Jar lids that do not pop on opening, or damaged pouches — discard.
Breast milk past the expiration date
Best-by and sell-by
FoodKeeper gives unopened breast milk 4 hours in the pantry or 4 days in the fridge, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
Past the date
For perishable breast milk, the storage clock matters more than the label: if it has been in the fridge longer than 4 days, discard it even before the printed date.
How to keep breast milk fresh longer
- Follow the label and your pediatrician's instructions first.
- Refrigerate prepared or opened products right away.
- Discard anything left in a bottle or bowl the baby has fed from.
