In this episode of the Journal of Human Lactation podcast, hosts Ellen Chetwynd and Adina Kopinsky discuss the article “Possibility of Microwave Thawing of Human Milk: Effects on Milk Composition and Temperature Distribution."

The article, published in JHL Volume 41, Issue 4, explores whether microwaving frozen human milk might safely thaw milk without compromising its composition or creating dangerous temperature “hot spots.”

Despite long-standing guidance advising against microwaving, this study reexamines the evidence using household microwaves—rather than laboratory equipment—to mirror real-world conditions.

Key takeaways include:

• Research on microwaving human milk is decades old, highlighting the need for updated studies.

• After microwaving and gentle inversion, hot spots were greatly reduced, suggesting that temperature variation may be less concerning than once believed.

• The findings indicate that while microwaving is not yet recommended, more research could clarify its potential for safe, convenient thawing in the future.

  
  

This preliminary study invites discussion about balancing safety, convenience, and accuracy in human milk handling, especially as more families rely on expressed milk.

Links to the article:
Ito M, Tanaka M, Date M, Miura K, Mizuno K. Possibility of Microwave Thawing of Human Milk: Effects on Milk Composition and Temperature Distribution. Journal of Human Lactation. 2025;41(4).

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