What Causes Breast Milk Jaundice _hot_ ✦ Verified Source

Certain factors may increase the risk of developing breast milk jaundice:

The leading theory regarding the cause of breast milk jaundice involves an enzyme called . what causes breast milk jaundice

It is critical to distinguish between "breast milk jaundice" and "breastfeeding jaundice" (also known as suboptimal intake jaundice), as they have different causes and management strategies. Breast Milk Jaundice - StatPearls - NCBI Bookshelf Certain factors may increase the risk of developing

The definitive pathway: Bilirubin (from broken red blood cells) is fat-soluble and toxic. To excrete it, the liver enzyme converts it into water-soluble conjugated bilirubin (direct bilirubin). Breast milk jaundice occurs when components in human milk non-competitively inhibit UGT1A1 activity in the infant's immature liver. To excrete it, the liver enzyme converts it

If you pasteurize breast milk (heat to 62°C), and the milk no longer causes BMJ in a test system. However, the fatty acid inhibitors remain. This suggests BMJ is multifactorial – the balance between gut de-conjugation (enzyme-driven) and liver conjugation (inhibition-driven) determines severity. This is why BMJ is benign (rarely causes kernicterus) – the inhibition is partial and reversible.

Breast milk may contain high levels of an enzyme called beta-glucuronidase . This enzyme deconjugates bilirubin in the infant's intestines, allowing it to be reabsorbed into the bloodstream rather than being excreted through stool.