Children with functional iron deficiency had increased mean levels of CRP (126.7 (SD 85.6) mg/l) compared to those with iron stores deficiency (71.9 (SD 74.7) mg/l, p<0.001), or normal iron status (99.8 (SD 70.1) mg/l, p = 0.01). Here, CRP is linked to hyperinsulinemic hypoglycemia, familial, 4.