Story perspectives

Study Reveals Gene Link to Breast Milk Production

9/12/2025

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Summary

Story summary

A UCSF study analyzed breast milk samples to explore gene expression related to milk production.
Breast milk is vital for infants, offering essential nutrients and antibodies; WHO recommends exclusive breastfeeding for six months.
In 2021, only 48% of infants were exclusively breastfed, often due to low milk production.
Low milk producers exhibited higher gene expression linked to lipid accumulation, while high producers showed increased mammary gland function genes.
Infants of low producers had greater microbiome diversity, indicating potential benefits of partial breastfeeding for gut health.

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Story summary

A UCSF study analyzed breast milk samples to explore gene expression related to milk production.
Breast milk is vital for infants, offering essential nutrients and antibodies; WHO recommends exclusive breastfeeding for six months.
In 2021, only 48% of infants were exclusively breastfed, often due to low milk production.
Low milk producers exhibited higher gene expression linked to lipid accumulation, while high producers showed increased mammary gland function genes.
Infants of low producers had greater microbiome diversity, indicating potential benefits of partial breastfeeding for gut health.