Probiotics can be taken when newborn babies are jaundiced. After birth, babies produce a large amount of bilirubin due to the destruction of red blood cells, and because the liver function of babies is not yet well developed, the bilirubin metabolism ability is poor, and babies have jaundice symptoms. Giving probiotics to babies can help quickly establish normal intestinal flora, enhance intestinal vitality, promote gastrointestinal motility and avoid constipation, thus reducing the reabsorption of bilirubin by the liver and intestinal circulation and increasing the excretion of bilirubin. When probiotics are given to babies, their metabolites can lower the intestinal pH and reduce the activity of glucuronidase in the intestine, preventing the decomposition of conjugated bilirubin into unconjugated bilirubin. The amount of unconjugated bilirubin decreases and the serum bilirubin level will begin to decrease. The dual effect shortens the treatment time for neonatal jaundice, speeds up the rate of jaundice subsidence and promotes recovery.