The Relation between Breast Milk Sodium to Potassium Ratio and Maternal Report of a Milk Supply Concern

Masahiko Murase, Erin A. Wagner, Caroline J Chantry, Kathryn G. Dewey, Laurie A. Nommsen-Rivers

Research output: Contribution to journalArticle

11 Scopus citations


We report that, among exclusively breastfeeding mothers at day 7 postpartum, those with milk supply concerns were significantly more likely to exhibit biochemical evidence of less progress toward mature lactation (elevated ratio of breast milk sodium to potassium concentration). Furthermore, an elevated ratio of breast milk sodium to potassium concentration was predictive of early weaning.

Original languageEnglish (US)
Pages (from-to)294-297
Number of pages4
JournalJournal of Pediatrics
StatePublished - Feb 1 2017



  • breast milk
  • breastfeeding
  • insufficient milk
  • lactation
  • milk supply
  • Na:K

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

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