To thaw frozen breast milk safely, the recommended methods are:

• Thaw in the refrigerator overnight or for several hours. This is the slowest but safest way.
• Hold the frozen milk container under warm (not hot) running water.
• Place the frozen milk in a cup or bowl of warm water and let it gently thaw.
• Do not thaw or heat in the microwave as it can destroy nutrients and create hot spots.
• Gently swirl the milk to mix the separated fat layer; do not shake vigorously.

After thawing:

• Use milk thawed in the fridge within 24 hours.
• Use milk thawed to room temperature or warmed within 1 to 2 hours.
• Do not refreeze thawed milk.
• If the baby does not finish the bottle, use leftover milk within 2 hours or discard.

These guidelines ensure the milk retains its nutrients and is safe for feeding.