08/01/25

Breast Milk Is Understudied. What Are Scientists Learning Now?

17:32 minutes

Breast milk frozen in storage bag and baby lying on background
Credit: Shutterstock

If you’ve found yourself scrolling through the breastfeeding world online, you know that people have a lot of strong opinions about breast milk. But what exactly do we know about the biology of it? Does breast milk really adapt to a baby’s needs? Does it confer immunity? How does making breast milk impact the breastfeeder? Joining Host Flora Lichtman to spin through the science of this sophisticated substance are experts Shelley McGuire and Deepshika Ramanan.


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Segment Guests

Shelley McGuire

Dr. Shelley McGuire is the director of the Margaret Ritchie School of Family and Consumer Sciences at the University of Idaho.

Deepshika Ramanan

Dr. Deepshika Ramanan is an assistant professor at the Salk Institute for Biological Studies.

Segment Transcript

The transcript is being processed. It will be available 2-3 days after this story’s publication date.

Meet the Producers and Host

About Dee Peterschmidt

Dee Peterschmidt is a producer, host of the podcast Universe of Art, and composes music for Science Friday’s podcasts. Their D&D character is a clumsy bard named Chip Chap Chopman.

About Flora Lichtman

Flora Lichtman is a host of Science Friday. In a previous life, she lived on a research ship where apertivi were served on the top deck, hoisted there via pulley by the ship’s chef.

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