Green Breast Milk Following Ingestion of Blue-Green Algae: A Case Report

Norah Naor, Elena Fridman, Franck Kouadio*, Paul Merlob, Nehama Linder

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Breast milk is an excellent nutritional source for newborns, and a change in its color can be alarming to both mother and physician, and may prevent breastfeeding. Different colors of breast milk have been reported such as blood-stained, blue, and bluish-green. We present the first case of green breast milk caused by maternal ingestion of blue-green algae pills immediately before and after delivery. The score on the Naranjo Adverse Drug Reaction Probability Scale was 5, indicating a probable adverse drug reaction. Laboratory analysis yielded no other abnormalities in the milk. The mother stopped taking the supplement, and the milk returned to its normal appearance 3 days later. This report should alert physicians to include supplement intake as part of the anamnesis for new mothers who present with breast milk changes.

Original languageEnglish
Pages (from-to)203-204
Number of pages2
JournalBreastfeeding Medicine
Issue number3
StatePublished - Apr 2019


  • breast milk
  • breastfeeding
  • green milk


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