Jaundice & the Breastfed Baby

Newborn jaundice is normal in most cases, appearing within 2-3 days post-birth, and affecting up to 60% of full-term babies.

Physiologic jaundice is caused by a buildup of bilirubin, which is produced when red blood cells are broken down. The liver is responsible for eliminating the bilirubin, but a newborn’s liver is often too immature to efficiently handle this process yet. This causes a yellow cast on the skin (which can be trickier to detect in dark-skinned babies) and the eyeballs. This resolves itself in a week or two as the baby matures further and red blood cell levels have lowered.

In a breastfed baby, jaundice is more common and tends to persist longer than a formula-fed baby (as breastfed babies are the standard, this means it’s the norm). True breastmilk jaundice, which only affects 0.5% to 2.4% of newborns, sticks around longer than one or two weeks…