Background: Physiological Jaundiceis more common in neonates. While causes such as incompatibility of blood groups or polycythemia can be easily identified, most are still undiagnosed. Phototherapy is an effective way to reduce the accumulation of bilirubin. Vitamin D is a fat-soluble vitamin that plays an important role in bone remodeling. It is also considered a steroid hormone, plays an important role in the main function of various organ systems, and can be a risk factor for changing the risk of many chronic diseases. There is a link between vitamin D and jaundice. Newborns with hyperbilirubinemia have low serum vitamin D levels.
Conclusion: There is an association between indirect hyperbilirubinaemia and vitamin D levels in neonates with jaundice at the level necessary for phototherapy.