What Is the Normal Bilirubin Level in Infants and Young Children?

The normal bilirubin level for jaundice should not exceed 12.9 mg/dL. Typically, in newborns, jaundice peaks around day 3–5 and begins to decline within approximately one week after birth. If medication fails to reduce the bilirubin level, it may be due to breast milk jaundice—a benign, common condition in which jaundice persists for up to one or two months in exclusively breastfed infants. In contrast, pathological jaundice is characterized by progressively rising bilirubin levels and requires prompt evaluation. To help lower mild jaundice, ensure adequate hydration (e.g., frequent breastfeeding), consider prescribed medications if indicated, and expose the infant to morning and late-afternoon sunlight (avoiding peak UV hours). If bilirubin levels remain significantly elevated, hospital-based phototherapy (blue light treatment) is recommended to safely and effectively reduce serum bilirubin concentrations.