Iron overload was regularly detected in hepatocytes of DGUOK mutant patients by liver histological examination.[4] Thus, we checked the expression of seven genes (TF, TFRC, DMT1, FPN, IRP1, IRP2, HAMP) in iron metabolism in control, patient and corrected iHep and iHep‐Orgs. The gene discussed is SLC40A1; the disease is Tangier disease.