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Can I Put a Bottle of Breast Milk Back in the Fridge After Feeding?

If your baby doesn't finish his bottle of breast milk, you might be able to save it for the next feeding. If the milk was freshly expressed less than two hours prior to feeding, it is fine to put the bottle into the fridge, says Katrina Pinkerton, a Connecticut-based certified lactation consultant. The breast milk should be discarded, however, if not used within 24 hours or if it were previously frozen and thawed. “The concern is that, if breast milk becomes contaminated with bacteria from the baby's mouth, then sits on the counter or in the fridge for a long period of time, there could be a buildup of undesirable bacteria which could be unhealthy for a baby,” says Pinkerton.

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