Breast Milk Jaundice

Breast Milk Jaundice is a condition that affects some newborn babies who are fed breast milk. It involves the liver and how it processes a substance called bilirubin, which is a yellow pigment made when the body breaks down old red blood cells. In this condition, bilirubin levels become higher than normal, causing the baby's skin and eyes to look yellow, a sign called jaundice. This usually appears after the first week of life and can last for several weeks. The condition is generally harmless but requires monitoring because very high bilirubin levels can affect the baby's health.

Breast Milk Jaundice is a form of prolonged unconjugated hyperbilirubinemia occurring in otherwise healthy, breastfed neonates. It typically manifests after the first week of life and can persist for several weeks to months. The core pathology involves increased enterohepatic circulation of bilirubin due to substances in breast milk that inhibit hepatic glucuronidation of bilirubin by uridine diphosphate glucuronosyltransferase (UGT1A1). This leads to elevated levels of unconjugated bilirubin in the bloodstream. The condition is distinct from breastfeeding failure jaundice and is not caused by hemolysis or liver disease. It is important clinically because it can cause prolonged jaundice but rarely leads to bilirubin neurotoxicity if monitored properly.