The guidance over leftover breast milk says toss it after 2 hours. But a recent preprint study shared on social media has some people questioning that advice.
Copyright 2026 NPR
Maria Godoy
Maria Godoy is a senior science and health editor and correspondent with NPR News. Her reporting can be heard across NPR's news shows and podcasts. She is also one of the hosts of NPR's Life Kit.
Ayesha Rascoe
Ayesha Rascoe is the host of Weekend Edition Sunday and the Saturday episodes of Up First. As host of the morning news magazine, she interviews news makers, entertainers, politicians and more about the stories that everyone is talking about or that everyone should be talking about.