Breast milk storage: Do's and don'ts - Mayo Clinic - How long can breast milk sit out
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For up to four hours before you need to toss it, Paladino says, while some sources say up to six hours. But this also depends on the temperature of the room. The higher the temp, the faster bacteria. Pumping breast milk is hard work, so you don't want any to go to waste. But how long can it sit out before you need to throw it away? Here's the truth.