Differences between breast- and bottle-fed babies

Infant formulas take two times longer for a baby to digest than breast milk. The slower digestion of infant formula can affect:

  • Feeding frequency. Babies who take infant formula usually want to feed less often than babies who are breast-feeding.
  • Sleeping patterns. Babies who take infant formula may sleep longer at night once they are about 2 months old. However, babies who are breast-fed usually catch up shortly thereafter, at about 3 to 5 months of age.
  • Bowel movements. Infant formula causes formed, brown stools that have a noticeable odor. Breast milk causes loose, yellow stools that have less odor.


Author: Debby Golonka, MPHLast Updated: August 16, 2007
Medical Review: Adam Husney, MD - Family Medicine
Thomas Emmett Francoeur, MDCM, CSPQ, FRCPC - Pediatrics
Michael J. Sexton, MD - Pediatrics

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